As others have already noted, there are a LOT of stairs to climb to get to the entrance and it's brutal with any luggage or if you aren't fit (75-100 stairs).
Pros:
Big comfortable bed. Towels were big and clean. Good, powerful shower. Renovated and looked new. Had full kitchen with dishes. Walkable to many locations. Instructions provided on which metro to take. Big TV. Lots of hangers. Relatively quiet.
Cons:
Stairs (enough to say it twice). Kind of sketchy location for the entrance. Hard to find. Extremely humid. Very musty/moldy smell (bathroom faucet was broken and leaking into wood). Couch not comfortable. Balcony doesn't have a good view. Instructions to get to apartment were confusing. There is a window over the apartment door with no curtain, so if the neighbours turn on their light, there is no way to block it when you are trying to sleep. If you need heat, the heater is not very effective.