Travelled in February for 2 night break. Apartment was large, spotlessly clean, and fixtures ( Beds, Kitchen, Bathrooms (2), were very modern.
Building is a bit old, but when you step inside the apartment door you are transported into the modern world.
Joao was a wonderful host, and explained everything in detail. He arranged airport pick up and drop off €20 each way with the wonderful Antonio. Worth the money alone for his entertainment and knowledge.
The only advice I would give is to pre buy a travel ticket, or buy on your first day. It is a very hilly walk from the apartment in different directions ( city centre if downhill though ), but you need to get the 735 bus to your door on the way home.
All in all a big recommendation for this apartment and it's very professional hosts. Oh, and yeah, Lisbon is beautiful