The place is really perfect! About 10-15 minutes from the metro station and Istiklal street and 15-20 minutes from Taxim square.
We had a bad experience of living in the hotel with the cheap AC right under the bed and we were afraid that it will be too cold to sleep under the air conditioner but it was very comfortable! The fan can be easily regulated and it's quiet, so we were sleeping all night with turned on the air conditioner.
Ilhan and Taha were very nice and hospitable, they helped us with everything!
I definitely recommend this apartment! :)