Mustafa and his studio was excellent.
He was really nice man.
He helped us a lot for entire travel in Istanbul
and the room that he provided for us was perfectly clean.
Room sercive was nice too.
The room is located nearby Taksim Square (just 3 minutes walking)
, so we could go everywhere in Istanbul easliy and quickly.

I highly recommend Mustafa's studio. He's studio will satisfy all traveler's need and he will help you a lot for whole trip in Istanbul.
If I have a chance to visit Istanbul again, I swear that to stay in his studio.