I and my family stayed in Alexis' flat for 3 nights. What to say: EVERYTHING WAS PERFECT.
Unfortunatly Alexis was not in istanbul during my check in, but his Dad has been so friendly and welcomed us with a big smile!
The flat is the same that you may see on the picture, the rooms were very clean and al the facilities worked well.
The area is rich of stores and restaurant and just 5 min far away from taksim square ( place where u can get bus, metro, tram).