Rui is VERY quick in his responses and quite objective. I didn't have any major problems with the apartment during the 12 days I was there. It's a good size for one person and has most of the things you will need for a short stay. It's a good value for money for that region.
I faced some cold days in Lisbon, so the lack of heating made it less cozy. And, as it's common in many Lisbon buildings, you can normally hear a lot of what's happening in the building or on the upstairs apartment. But nothing that bothered me too much.