I didn't have the opportunity to meet with Kamil, but his staff is very nice and helpful. Sultan's Inn is a great hotel, located in the heart of Sultan Ahmed. Is such a perfect place to stay, walking distance from blue mosque and all the other attractions that this magic city has. The view from the hotel is beautiful, the hotel rooms are clean and comfortable. Specially my room had a little balcony that stole my heart.
About the tours, if you are going with limited time do not book a tour, they go way too slow and can waste a lot of your precious time.
Other that that nothing else to say, just that I highly recommend you this hotel to visit Istanbul :)