We spent two nights at Alexandre's flat and we enjoyed our stay very much! The building is located at the foot of Alfama - a lovely historic and quite touristy area with lots going on during the day and at night. All the main spots are at walking distance, which is a grat advantage.
It's a rather old building so it can get loud at times. The flat itself is arranged with a lot of taste and the space is well utilised. Nonetheless we found it a bit too small for four people and we had a difficulty in getting enough fresh air inside the flat as it was quite humid, warm and windless outside.
Although we didn't meet our host in person, we had flawless communication at all times!