Murat was a great host and service was pretty good.
Check in and check out was smooth and quick.
Apartment is pretty similar (but not identical) to one that on the photo and has everything you can possibly need for the trip except washing machine.
Apartment location is great if you are planning to walk a lot inside old city and visit top Istanbul sights, but neighborhood can seem a bit odd, if you are used to European countries.
Overall it's a good apartment for the price and Murat is a great host.