The flat was great: clean, comfortable, and exactly as pictured. The location is awesome and close to everything. Communication and check in were quick and thorough. Rooftop was nice as well.
The street at night is very loud, but the windows do a good job of sound insulation. If one was to sleep on the couch, the noise would prob be disruptive, but it was quiet in the bedroom.
The bedroom is close to the stairwell, so you could hear other guests coming and going if they were loud. There is a gate with a keycard reader just outside the flat that other guests frequently opened and closed (often slammed) which was definitely noticeable from the bedroom, but with the AC running, the white noise drowned most of it out. Sensitive sleepers might be more bothered.