This place is amazing. we stayed at 3 different locations while our tour to Istanbul. But this was the best place among all. very good size rooms. lounge is very spacious. kitchen is fully equipped. All shops are at walking distance. literally 10 minutes walk to Galata Tower, Taksim Square and good parks nearby. Kerem is Great person very very helpful. I bothered him alot but he guided me everytime. response within seconds. He dropped us to Airport at very minimum cost. He preferred good relations with people over business.
This place is no doubt 5 star and if you say Kerem as a host than it should be 7 star.