We had a very good time at Tevfik's place. We didn't see him too much, but there was always someone else in the reception who would help us in case we needed something. The apartment was just as described and showed in the pictures, and was at a 15min walk from the Blue Mosque and Hagia Sophia (though the walk included a 3 streets steep slope, which may be a problem for kids or old people). Everything else, was (again) as described, so no complaints!