We spent 3 nights at Luis Filipe's apartment and had a great time exploring beautiful Lisbon. We were very lucky that we were able to do an early check in as our flight arrived at about 7 AM. It was an easy walk from the metro station and co-host Ricardo was waiting for us. He gave us a great overview and recommended a couple of restaurants in the area. He was very responsive when we realized there was only one towel and provided additional towels promptly.
We were there on a weekend so it could be fairly noisy at night but once I realized to shut the outer window shutters that cut the noise down quite a bit.
All in all, we found it a great base from which to wander around the city.