We booked this via Late Rooms, and the reviews there were pretty good. We have pretty much decided we will be coming back as we regularly visit this area.
Location
The hotel is located adjacent to both the railway and the road so you can look at it one of two ways - you do get a bit of noise (We were by the railway but to be honest we both slept straight through both nights) or you have excellent travel links. It's perfect for getting to/from Cascais and Lisbon, and it's 2 min to the beach as well.
Rooms
Extremely clean and comfortable. This is better than you can ever expect for the money - we only paid 33Euro a night and we were really pleasantly surprised. Rooms have brand new TVs, air con and heating.
Staff
Couldn't have been more helpful, even booking me in for a pedicure. They are very helpful and Ana has a wicked sense of humour. The staff have great English and you get the impression they are friends. That makes a hughe difference to the atmosphere here. Also the owner came in both days we were there - how often do you go a hotel and that happens?
Facilities
There isn't any parking on site but there are 2 free car parks up the roa (100m) and wer got in there fine. Apparently it's not always that easy but we were more than happy. There is a lovely bar that sells drinks at sensible prices, and 2 lounge areas on the ground floor with 2 more TVs. Breakfast is on the lower ground foor- simple but tasty.

So back to the stars. We were so surprised it was only a 2 star hotel we asked why. Apparently a few years back the owner did a load of renovations. They took out the cetral heating, put in the aircon and heating systems, new bathrooms by the look of it too, and then the ratings people came back. They were then advised the hallways are 10cm too narrow to meet the 3star standard.

If you want a good budget hotel you won't go far wrong here. Top place for a cheap break.

I stayed with friends in Residencial Sao Mamede in 1999 after finding their website and emailing the owner directly, who was very accommodating. Ten years later I was pleasantly surprised to find it listed on a booking website as a low budget hotel and at the best price in the area and didn't hesitate to book again. I think it was the same owner who was there too.

It's well priced and very well run - it's priced the same as other 'resedencials' in the area but there aren't many of this size and quality and it's obvious from the clean luxurious reception and ongoing upgrades to the rooms that the owner wants to be considered a proper budget hotel, and from my experience this time round in 2009 it deserves to be considered as such.

It has a fantastic location just yards from the beach, beach bars, promenade and train station of Estoril (not to mention gardens and Casino) so all the local attractions are within eyesight and 2 minute walk, as is direct rail travel to other towns, beaches and Lisboa - something a lot of the more expensive hotels in Estoril and the Cascais coast cannot boast.

Hence it is a perfect base for everything in the area or just for the very lazy who want nothing more than a beacn resort on their doorstep. Which makes the pricing all the more attractive. I believe it was renovated in 2004 but by the looks of things they keep making improvements as we had a brand new flatscreen TV in our rooms with nearly 40 satellite channels.

It's comfortable throughout and has a small well kept 24 hour bar near reception and a large clean breakfast room with great all-inclusive breakfast (cereals, croissants, rolls etc) while watching the news channels on TV. Reception itself is prompt and friendly and though I grew up in the area and speak some Portuguese, they were just as helpful to my English friends.

The only criticism would be that the rooms are quite small, some of the furniture is dated and the air conditioning units in the room seem a bit weak (it was 30 degrees) but you take these issues in a budget hotel in such a great location and the rooms did have fitted wardrobes with floor to ceiling mirrors, clean en-suite bathrooms and maid service everyday.

All my friends were really impressed that I knew about this place, I believe it is the best kept secret for a budget stay in the area and would recommend it to everyone. They were doing more work while we were there so clearly this is a place that aspires to improve all the time, I just hope that as it appears on all the booking websites the prices don't go up too!