my man çiwan is a very nice and hospitable host, considerate and polite but emphatic. he helps you in every way possible and gives very precise directions, info and advice both before and after arrival.
the place is homey and very clean as everyone's saying. the bed im my room (smaller one) was firm enough and very comfortable so i was able to sleep well even with open windows during morning calls for prayer.
the location of the appartment is ok as well, close to taksim and everything. but it is down the hill so you have to walk back up every day (like everywhere in istanbul though). it's not far anyway. the neighborhood is calm and quite. not without some drama in evenings but never through the night. and there're some grocery stores and kebab dens in the immediate proximity so you can eat or buy some food right away.