Me and my girlfriend decided to get this house to be next to the city centre and to enjoy Lisbon at its fullest, without worrying about transports and long walks. We got a little bit disappointed because in the description there was no hint about the fact that the house is really in a steep part of the city. It's not Bairro Alto, but it ever worse to reach by foot. Not suggested for people with difficulties or heavy loaded with luggages. Our flight waze delayed for technical issues and getting in touch with the guys of the agency was hard! Yes it's an agency and not a couple hosting people and welcoming them. When we tried to call to tell the guys we were late an automatic message was answering and asking for the right language. But in the first instance was really hard to understand what we had to do to get in touch with someone physical. Then when we reached the apt nobody answered so we had to get inside the house (the door was open) and find our apt alone. Luckily the door was open because there was a guy waiting for us, but if we didn't enter without permission we would have risked to never get the keys and to pay the fee for the late arrival (after 22:00, and we arrived at 22:50, we waited for an answer for like 10mins without getting any response). The house is in a loud neighborhood and we weren't feeling comfortable going back home in the night. We were surrounded by drunk people screaming, but not cheering, just screaming or talking in the shadows.
PROS: The house is really really clean and stylish. There is a welcoming local wine bottle in the fridge and we had everything we needed for a pleasant stay. The office of the agency let you deposit the luggage's if you have a late return flight (care, the office is in another really hard spot to reach, because of the steep streets).
CONS: Hard to reach, complicated to get in touch, no privates but agency, not in a comfortable neighborhood.