My boyfriend and I stayed in Maria's apartment for 3 nights over a weekend visit to the city. There was quite a bit of noise at night from the bars/restaurants on the street below, but in the main bedroom (which is at the back of the building) we slept fine – if you're a sensitive/light sleeper I'd recommend earplugs. The apartment is really lovely with a nice balcony at the front which lets in a lot of natural light, and there's a great view over the city from the kitchen/bedroom windows. Super central location (hence it being a little busy/noisy) so great if you want to walk everywhere: lots of shops/cafes etc. right on your doorstep. Check-in/out was easy with a keycode system and Maria was always quick to respond - obrigada!