What was great: location (lots of bars and restaurants around, close to all attractions), huge closet, spacious & nicely decorated apartment, good wifi, working heating system
What was not so great: the stairs (it's 4 flight of narrow stairs, would not recommned for people with big suitcases or who have troubles walking up the stairs), a bit loud (noise from the street at night and from the hallway)
Overall really good experience.