A great location, tram station right out front (Hagia Sophia, Blue Mosque, Grand Bazaar etc all within five to ten minutes on the tram), easy access to all major tourist attractions. Check-in was easy and Ra was great with communication. The room has everything you need for a comfortable stay and enough kitchen utensils to cook if you like. A couple of drawbacks, one was being on the ground floor so you hear the front door and elevator every time people come in and out although it really wasn't an issue. There is a worksite right outside the door so if you open the curtains the view is of the alley and worksite. This really isn't a problem if your not planning on spending much time in the room and are out sightseeing but just keep it in mind. Finally, and this was no issue at all for me but may be for some, the room is really quiet light at night. There are lights right outside and the curtains do not block out the light so if you like a dark room for sleeping that may be a problem.
Room was perfectly clean and there are grocery stores and restaurants conveniently close to the room. It's also walking distance to Taksim square however just keep in mind there are lots of steep streets to climb which is a great workout.
Overall if your looking for a location close to transport, the river and attractions this is a good place to stay.