Carlos was a fantastic host. He is very friendly and communicative, and he really made our stay much easier.
The house is very well located, specially if you arrive by train (just a few steps away from Sta. Apolonia), very close to Alfama (lots of restaurants and wine bars) and like 15' walking to Praça do comercio. The view from the living room and the main bedroom is very nice, as you can see the river.
The apartment is pretty basic, but it's functional and enough for a few days. The house was clean, although the bathroom did not smell very well (it seemed to be some pipe problem, not because of dirty).