we stayed here for a week, during the first part of a trip through Portugal. Very spare modern rooms (but we'd stayed in an AC in Grenada, so we knew what to expect). The clientele seemed to be mostly business people, but the staff was extremely friendly and helpful (and fluent in English and several other languages). We got excellent restaurant recommendations for places in the area, and help on figuring out how to get to Sintra and other places by public transportation. The breakfast buffet was lavish. The hotel's north of the more touristy areas of Lisbon, so be prepared to walk (we did) or take the metro or a bus to most of the places you'll want to see. (and if you walk, you'll need good shoes- Lisbon's as hilly as San Francisco.)

For a 4* hotel and the price going with it I was expecting something good at all levels.
Yes the design is nice, rooms are clean, bed of good quality etc.
BUT:
- the staff is not vey nice
- they do not even have an iron for business traveller (one night stay)
- no safe in the room
- no second door in the room to be isolated from corridor noise.
- access to internet is very expensive
- yes they do have a mini bar fro free but is that really a gift when you pay 120€ to have mineral water and coca cola at 1 US$?

This is a bit disappointing with regard to their ranking (4*) but otherwise it remains acceptable.

The hotel is very modern and is decorated with style. The free minibar and free snack in the hotel lounge is a plus. Breakfast was good but there was not enouth stuff so they didnt refill the buffet quick enouth. But our biggest complains are about the receptionists. We met 3 and all of them were not the friendlyest and the first one tried to charge us 15 euros for the parking. I recommend to park in the street in front of the hotel where it is for free.

Modern Hotel in a central but quiet location in the heart of Lisbon.
We have stayed in many others hotels in Lisbon and we think AC is one of the best and a good value for money!!
Modern decoration with a lovely lobby and great rooms.
Confortable beds, big bathroom and free minibar!!
The brekfast is also very good with great selection of food.
Kind and helpfull staff.
We recommend this Hotel to anyone!!!