Highly recommended and I leave my comments below.
Very good Location
: it took only 10 mins to 'Hagia Sophia' on foot.
Easy Check-in
: even I checked-in 23pm, I didn't have any problem.
Clean & well organized
: the room was clean and they changed towel and clean my room every day.
the room is equipped well (refrigerator, closet, bed, shower, etc) even considering their price.
Service
: They provide shuttle-bus service, which I didn't expected at all. It cost me only 10 eur from the hotel to the airport, Sabiha Gokcen Air port (about 60km distance from the hotel). I was concern about the taxi driver's overcharging scam, so their shuttle bus service was so great to me.
Only problem I had was
there wasn't any hotel sign or reception, so it was not easy to find the hotel. I could reached them by phone easily, but they should put some hotel sign front of the building.