I have been in Sunny Beach about 9 or 10 times, stayed at several hotells.
I found Sea Grace a perfect place to stay. It's close enough to the beach, if you ge to know the shortcuts it takes about 5 or 10 min to walk. It's far enough from the city, so you don't get the 24/7 techno music from the senter, and drunk tenagers walking around the streets in the middle of the night.
It's short to the buss stopp, so you can go to the flower street ( Sentrum), Sveti Vlas, Nessebar and Bourgas. The city train is allso just down the street.
The Staff at Sea Grace is wonderfull. They are kind, funny and really nice people. Even though not all of them know English, they understand most, and try to help as much as you can. Blagovesta and Bobby in the reseption on the other hand speaks very good English.
There is allways a good mood around the hotell, and it's a nice place to be if you want to relaxe, have fun with your kids in the pool, or go on a party trip with your friends. (Even though it's not mutch party at the hotell, youngsters will enjoy the silence at night and in the morning.)

The only bad things about the hotell is that there are several hotells nearby that are still building, so the streets can be a little messy. The internett is not good all over the hotell, but if you have bad reseption, just go down to the pool, or in the bar with your laptop.

If you want your clothes washed, you can go to the next door and get it washed for a small amounth of money. They wash, dry and iron it.

we have nothing bad to say about this complex.
The stay that we had was amazing and we will be booking again for next year.
The rooms are clean and you get most of the sun all day .
The beach is close and the center is about 15min walk.
The staff are realy nice and made our stay that extra special

We have been in Bulgaria at the sunny beach, several times before, but we have never came back with that kind of bad feelings, what we still have now.
Most of the issues are coming from the false promises what our tour operator told us (http://www.robinsontours.hu/).
We wanted to relax, and spend a lot of time on the beach.

We have arrived late evening to the apartment house, and the first thing we have noticed, that there are no pavement or even paved road around the building, nor in the area.
Next morning when I've woke up, and I looked out, I saw a lot of homeless people and their shanty around this apartment house. (I was looking for hidden spy cams, because I couldn't believe that this isn't a just a joke.)
One of the air con was broken (they have fixed it in a few days), the cable of the tv was pulled out of the wall (they have also fixed it).
There were 3 spoons, 3 forks, 3 knifes for 5 of us!
The drain in the middle of the bathroom was life-threatening. There was sewage flown from behind the toilet, every time we flushed it.
There was also some cockroaches...
The staff hardly speak English.
I would expect a bit more from a 4 start apartment house!

The beach is more than 900 meters from the apartment house. I've measured with gps, and you can easily check it on any kind of online maps.
(If these guys, who reviewed that accommodation, say, that it's 5 minutes from the beach, than they were running!!! Think, 900 meters in 5 minutes, means 10km/h!!!)
It's about 15 minutes walk from the beach.

Extremely disappointed in this accommodation and the tour operator who also lied to us.

Stayed in Sunny Beach this July for the first time. Must say that I loved it. Stayed in the new Sea Grace apartments with my husband. The one bed apartment was beautiful with everything you could need. Complex was lovely, very modern. Staff were very nice, hospitable and friendly. Relaxed by the pool mostly, ate from the snack bar and had a beer most nights before heading into the centre. This was a twenty minute walk or €10 taxi.
Absolutely loved Sea Grace - 5 min from the beach in a quiet area of Sunny Beach. Highly recommend it!!