Very good place, almost in the middle of the most important historical things in Istanbul. The house is pretty big so you'll be able to have personal space.
Mehmed was beyond generous and kind as a host, If I could, I'd give 10 stars to him.
Very knowledgeable so I'm sure he'd help out with almost every question or curiosity you might have. Maybe he'd even give you a tour around the city :)
Also. the place is near to bus and metro stations that can lead you anywhere really.
I definitely recommend visiting them!