This hotel really is a fantastic venue! Originally, we were due to go to another of the chains hotels in Kamari, but due to an error on their part, they upgraded my wife and I to the Pantheon Deluxe Villas - and aren't we glad they did!!
On check-in with hotel manager Nikki, we had our cases taken to our studio apartment, then shown exactly what was what inside. We were then brought a complimentary food box which consisted of a bottle of wine and fresh fruit - nice touch!
The complex consists of apartment studios (basic, but very nice & comfortable) and deluxe villas with their own small pool (more expensive). Maids come to clean/make the beds/replace towels etc every day (unless requested not to) and do a very good job. The beds are comfortable & clean. The shower is good and powerful with plenty of hot water. There's a TV and a CD/DVD player. You also have a small terrace/patio area and all the studio apartments open out onto the pool area.
On our first night there, we decided to go to the restaurant for our evening meal. While the restaurant itself offers beautiful views overlooking the caldera with the towns of Ia to the North and Imerovegli to the South, the menu is pretty expensive it has to be said. Our meal consisted of 2 starters, 2 mains and a glass of white wine and we paid €90! It has to be said though that they did give us a glass each of Vinsanto (delicious Santorini dessert wine), a dessert to share and coffees for free. That said, it was still a hefty price tag.
You are quite cut off from reality when you stay at Pantheon, but it also means that it is really quiet - bliss!!! Children are allowed, but we didn't experience any on our stay thankfully! The pool has 12 really comfortable sun loungers and they put out complimentary towels for you to use as well. Out of our 10 night trip, we gave ourselves 4 'pool days' and, because we went low-season, it meant we were the only ones around! Lovely!!
A buffet breakfast is also served in the restaurant and this is included in the price. Included are bread rolls, cooked bacon, sausages & scrambled eggs, cereals, jams, croissants, pain au chocolat, fruit juice, cold meats, salads, loads of tea variants, coffee. I think there is also a fuller menu available, but we saw no need to use this as there was always plenty available. Very helpful staff also come and take your tea/coffee requests and are always available to give you a refill!
You have to walk approx 1/4 mile to get to the main road to catch a bus. This isn't too bad as you have great views on one side of you and other deluxe hotels on the other. We travelled to Fira (about 15 mins ride), then from Fira down to Kamari (about 20 mins). Each time the fare is €1.40 each way per person. You can go the other way also, which takes you to Ia. Beware the main bus station in Kamari though - it can be very confusing with loads of people just milling around. There are no signs as to where your bus will be going from and no numbers on any buses (which are actually very large coaches). No-one who works for the bus company wears any kind of uniform, but you can tell that there are a couple of blokes there who occasionally direct people in the right direction. When a bus is ready to leave, they start shouting out where they are going to and that's your cue!
You also have the option of walking. From Pantheon, Ia is about 1.5 hours walk along a lovely (but sometimes rugged) coast path which is very popular. You can also walk in the other direction to Fira going through Imerovegli. This takes about 45 minutes. Both these walks contain both uphill & downhill walking and can be hard going in places, but it is worth it!
Look out for the Restaurant Iris where you catch the bus. A nice little taverner/restaurant which pretty good food, but not so salubrious inside, but the chap who runs it is very friendly and funny!
There is also a little snack bar next to the hotel which is not part of the hotel, but does serve some OK food.
We can also recommend (very highly actually) a place called 'Mamas Restaurant' in Fira. Really good food and service here at a fairly reasonable price.
Small cars/mopeds/trikes are readily available to hire for a pretty reasonable fee (though we didn't do this). The hotel can also arrange to book you onto various day trips, but you will be able to get these cheaper if you locate the Kamari Tours offices in Kamari where you can book direct for cheaper. We did the 'King Thirass' boat trip which lasts from about 10.00am til 6.00pm and we got picked up and dropped off right to the door (you'll pay around €26 each for that trip).
There is a drawback regarding the beach though. There are none around basically. If you want a beach you will need to get yourself to Kamari where there is one really long beach. As it's a volcanic island, there is no sand as such, but more coarse, black stones. The nearer to the sea you get, the more painful it is to walk on it, but it is worth it. There seems to be lots of sun loungers/parasols available which you don't need to pay for (maybe that was a by product of going low-season?).

All in all, a gem of a hotel in a gorgeous location. Miss it - miss out!!!

Actually ended up here a few years ago as an upgrade when our original hotel was double booked. Quiet hotel with amazing views, great food and car parking so the whole of the island can be enjoyed if you hire a car. The main hot spots of the island get very busy in the height of the summer and it is really nice to be able to return the quiet hotel but still appreciate the views Santorini has to offer. I would return. We got a nice bottle of wine as a leaving gift.

This hotel boasts a 5 star rating but we can’t figure out how it got that rating. In reality it is a 2 or 3 star hotel. For the price, it is not a good value.

We stayed at the Pantheon Deluxe Villas on Aug. 23 – 25th. We were picked up at the port by a driver contracted by the hotel. We shared the van with people going to other hotels. We were the last stop and it took about 45 minutes for a normal trip of 15 minutes.

Although the pool and the property look nice and it enjoys a beautiful view of the water and caldera, we were disappointed with our room. It had cheap linens and furnishings. It had the bedroom and bathroom upstairs and a living room and bathroom and eating area downstairs. My friend had difficulty with stairs because of sore knees but they said there was no one floor villa available.

Our room had many problems such as: one of the air conditioners did not work, a shower cord too short to take a shower, no soap, several lamps either not working or missing bulbs, a toliet seat not bolted, green slime on the shower heads, no hairdryer, freezer not defrosted, and no phone in the bedroom. The hotel staff did provide us with soap, hairdryer, and bedroom phone.

We had no water one morning. The hotel said it had to be brought in.

Internet - There is internet access in the common area by the reception desk and the pool area. You are not able to get it in the room.

Breakfast was included in our room rate. It is served in their restaurant which has a beautiful view. The breakfast buffet bar offers the usual breakfast foods, but in addition we could order omelets, crepes, etc. We had one evening meal and it was good.

The hotel is off a dirt road in a very remote area and there is nothing near it. We rented a car which is necessary if you stay at the Pantheon. If one wants quiet and privacy and to get away from people this would be a good area to stay but not at this hotel. We heard from others that the Princess (down the road from this hotel) is a true 5 star hotel and offers great service in a luxurious setting. Unfortunately, I cannot say that about the Pantheon.

We've just stayed in this hotel for a few nights. I must say that I agree with ceri1234, another reviewer, in many aspects. To my mind, the quantity of minor niggles reduce this hotel from 5*, as the position themselves, to 3*. The common area is fine, is clean and looks posh. But the rooms (at least our studio-villa with garden view) were less so. Furniture is very basic and rather tired-looking. TV was showing only Greek channels, DVD was not working, neither did telephone. They've sent a technician to fix DVD for us but he failed because (as we suspect) TV was an old analog model which wouldn't receive digital channels or connect to digital DVD-box. Btw, more expensive villas had flat-screen TVs. The man was so nice that he gave us his own flat-screen TV! But before it happened we were with no TV for half of the stay. That was not a tragic thing as we were out most of the time but if there is a TV it should be in working order, no?
Another niggle will be towels starched to sand-paper condition. I found it difficult to use them. They were really scratching my face. Speaking about bathroom - the layout of our bathtub was so poor that all the water from shower was pouring on the floor. There was a drainage hole in the middle with the cover which twisted out if stepped on and thus opening the hole - I stretched my ankle on it.
On their website they call themselves Villas & Spa. Spa is not existing. Not even basic treatments. Nothing. They say they have a "cooperative hotel" 15 min away which offers spa treatments but I didn't find such a round-trip appealing (especially if you know how the roads there are). No gym either.
And the last negative point is the wind (though it's hardly the fault of the hotel). But it's built on a narrow strip of land, probably only 200m wide, on the very top of the cliff - this is the reason for breathtaking, almost 360 degree views. But this is also the reason for strong winds coming from everywhere. Some gusts made the solid wooden sunbeds fly around, to say nothing of clothes and towels.
Overall, we enjoyed our stay in Santorini as we tried to ignore these issues and stay out more. We were provided with a complementary car which was a great help. But please double-check with the hotel if they are still doing it as we were told that they would stop this practice.
I would recommend this hotel for those seeking views and peace and quiet but then it's worth looking for a bargin as the place is not the cheapest.