I booked Rita's & Helder's apartment without doing much research on the area. It was based purely on reviews by others stating "city center." I'm so glad I did! They're apartment is literally in the center, close to the metro/bus lines & sits above an alley way of shops & restaurants. It was the perfect place to spend 2 nights for 2 people.
The apartment is clean, chic, & has the basic amenities you need. FYI, the doors lock automatically when you close it so don't forget your key like we did! But Rita was quick to respond & saved us from our folly. If you're an early sleeper, this place may not be the place for you. The windows block a good amount of sound but isn't sound proof. Hallway up to the apartment can be narrow so beware if you have large suitcases. Flooring is a bit thin so we did hear someone walking around above us on one of the days but not much other than that.
All in all, totally recommend this place. Wish we could have stayed longer.