This is a comfortable, quiet place to stay. Very close (walking distance) to all the major attractions, yet still manages to be away from the chaos. The people who run the hotel are very kind, relaxed, and nice to interact with. This was my third stay at the Siesta Hotel, and it would be be my first choice for another stay in Istanbul.
We stayed in Taksimistanbul Apart from 13th to 17th February and we had good time there. There was notnihg to what we should complain. The room was clean, the receptionist/owner was kind person, he recommended us some monuments... The location was practically in the center (not the old one, but you can walk there or go by tram), for the first time we were little bit scared from the street, it is all in reconstruction but it was safe. I really can recommend this hostel.