Great stay! The location is unbeatable, amazing cafes and restaurants right outside, we could have eaten a great meal at a different restaurant every day for a week within a 5 min walk, also close to Taksim and Public transport to get to other places. Air conditioning was strong and worked well, and communication with Pelin was smooth too.
Be warned that it's up 3 flights of stairs which might be difficult for older folks or anyone with mobility issues. The only real issue we faced was the quality of the mattress which was quite thin and sagged in the middle. Not a huge problem for us but something to consider if this is important to you.