Sebastian is a really terrific host, and the apartment is wonderful. Sebastian was extremely responsive, helpful with tips and available to answer any questions about the place. I traveled with two others and we basically each had our own room (third person opened the amazingly comfortable sofa into a bed), so everyone was happy. Great to have an extra bathroom too. The location is really superb, steps away from Galata tower and tons of cool vintage shops. Downstairs is a lovely bakery so that's a plus too. I would absolutely stay here again!