We stayed at Behic's apartment for three nights. The apartment is very central and close to Galata Tower. This area is in an elevated position and so some people may prefer to take a taxi back but they are numerous and there are always taxis nearby It is only about 25-30 minutes walk downhill to the Blue Mosque, Topkapi Palace and the other main attractions. We loved the location and didn't mind the walk back.
The apartment was beautiful and exactly like the photos. Everything was perfect and the communication with Behic to gain entry was excellent.
We can highly recommend this place and would definitely book it again when in Istanbul.