Tansel was great! We arrived in Istanbul at around 7pm thinking we had a hotel, but we didn't. Thanks to instant book and Tansel's responsiveness, we had a great place to stay in just a few minutes. The apartment is in a wonderful location, 10 minute walk from haga Sophia and blue mosque, 20 from grand bazaar. On a quiet street, and the apartment itself is inside (no outside Windows) so very quiet at night. The garden is huge and has a beautiful view of the ocean!
The room was a great size, bathroom clean (and lots of hot water in the shower, good pressure). Hansel provided towels and guide books (Rick Steves!), as well as really great recommendations on where to eat and how to use our. The place by the lighthouse he recommends for breakfast is great- a quick, pleasant walk from the apartment, cheap and full of locals. Great food too!
Our only complaint would be that the apartment was a bit stuffy.