This apartment has it all; location, comfort and excellent, experienced hosts.
It is literally two blocks from the Blue Mosque and the Hagia Sophia. You can't beat this apartment for the location near all the tourist sights in the old city.
It's a true three bedroom with a large living room/dining room, full kitchens and a bath and a half. There were four of us, my family and a friend who met us for our leg in Istanbul. There was plenty of room for all of us and we never felt we were in each others way. The beds were hard, but comfortable, plenty of pillows and extra blankets. The towels were amazing as you would hope. Everything was sparkling clean.
Check in was easy. Elif met us there and walked us through everything and gave us some excellent recommendations.
It is on the second floor and you have to walk up the stairs. There is no lift.
I highly recommend this apartment. Especially if you are only going to be in Istanbul a short time.