Highly recommend staying here. Apartment is well located in Barrio Alto, within walking distance to main attractions and a metro station/trams only a few minute walk away.
The apartment itself is well designed and spacious with all amenities provided. There were only two of us but apartment could easily fit 4-6.
Nuno was great in responding to queries prior to arrival and also met us when we arrived at the apartment. He has lots of local knowledge about Lisbon, places to eat, drink, activities etc and is very passionate his guests enjoy Lisbon.
The only disadvantage for some people is that it can be loud at night, apartment is in a busy night-life part of Lisbon. Though we enjoyed the party aspect if you like early nights in probably not the place for you!