Serkan is the coolest young man you will meet in Istanbul, very friendly and eager to help. He goes extra miles to provide you information with local and city. His place is clean.
The only issue we had was there was no fan, or AC and when we kept the window opened because of the July month's heat, we got many mosquitos bites. If you don't mind to take tramp and enjoy the scenes to see Istanbul old part and to visit all the major attraction, it will take 45 minutes+ by the tramp.
I will diffidently will stay with Serkan again next time I visit Istanbul, specially in winter.