We (2 couples) loved our stay in Ema's apartment, is it in a great location in the Alfama area with views out over the buildings to the river and cruise ships.
Our check in was really easy, and although the apartment is compact, we had plenty of room.
We enjoyed exploring the area around the apartment, and there are lots of restaurants and places to have a drink within a 5-10 minute walk!
We would recommend this place for couples and friends.