Bernardino & Rui were responsive in their messages and gave us clear instructions to find the apartment but we didn't see them as it was one of their friend who arrived (a bit late) to give us the keys. Our main concern was that we didn't get the apartment we could see in the pictures, and we didn't get a response when asked the host about it. It's too bad, because although smaller the apartment we had was still nice and very clean. We would probably have booked it anyway, but it didn't feel very honest.
Anyway, the location is ideal to visit the center of Lisbon and we had a lovely weekend.