Alzer Hotel, located just across from Blue Mosque, is a charming place in a perfect location. It's almost more of an inn, in a converted private residence. The front desk staff are all wonderful and extremely helpful. Misut really went above and beyond to make sure we maximized our stay and saw and ate what we wanted. The entry is through a restaurant and cafe, and there's a nice seating area in the lobby. The rooftop breakfast bar is also charming though don't expect anything elaborate. Glitches: taxi drivers won't be able to find the place based on the address. They cannot drive straight to the door. You just have to get dropped at Sultanahmet Square, and walk a few meters. Climate control is central, cannot be controlled by room, but it was fine. The room we had was small and without the view we expected, but it was also just fine. Overall: great base camp for a couple days in Istanbul.