Hasan is an amazing host that truley cares about detailes. He will help you with all the small things like Sim cards, istanbul cards, activating your istanbul HES code, local tips and recommendations. The place also has a great location( if your into antiques this is the place for you). About 10 mins walk to Taksim Square and Istiklal street, and 10 min walk to tram station. If I come back to istanbul I will definitely consider Hasan's place