I and my friend visited Istanbul for official work and stayed in a different hotel in Asia side for a week. Then we got a day and a half to roam around and found this place and booked. Since the owner Mr Alihan has three properties nearby, we landed up in different location, however, they were helpful in accommodating us in Sultan's Inn. The location is just behind the Blue Mosque and surrounded by lot of restaurants and taxi stands.
We reached there at 10:30 am and requested for early check-in just to drop our luggage and requested for two single beds. They were very quick in arranging the room for us! I haven't met Mr Alihan but met his colleagues, they were very friendly and courteous.
The room size is very small, just had enough space to accommodate two beds, no extra space to leave your luggage. But we are happy with the room as it was pretty clean and neat. Private toilet and bathroom are very clean. They have a breakfast setup at 4th floor and the terrace has a nice view to Blue Mosque and sea. Breakfast is simple and good enough to start the day!
Overall, it's a very good place for a short stay and location is very good.