The host was very easy to talk to and even sent a friend of his to give us the keys at the airport. The house was really clean, neat and spacious (perfect for 4 people).
The location is amazing. It is one street away from the main shopping/restaurants street (Rua Augusta)

The only downside was the shower's door which did not open easily (but this is a minor thing).
I recommed this apartment to anybody willing to come visit Lisbon.