Very clean and well equipped. We arrived in Istanbul on a very early flight, but we were allowed to store our luggage in the lobby of the apartment building, just like a hotel.
Our only concern is that anyone renting there should be aware that if intending to walk to Istiklal or Taksim, it is a steep hill and heavy traffic must be crossed. We would not recommend it for anyone who mobility challenged, unless they have arranged car transport. Taxis can be caught (easier up the street in front of Sheraton Hotel) or called, but often they are busy. We walked most everywhere, and did fine, but we just want people to be aware, especially is they have walking issues. There is a grocery store right across the street, so we bought bread, extra water, ect., very easily.
Otherwise, the pool and sauna were wonderful and we would definitely stay there again. Oh, and communication was great. Highly recommend!