Isik is a very good host as well as a very nice person :-) He was always in touch and it wasn't hard to meet with him. The apartament was exactly like in the offer. The location is perfect, next to the Taxim Square and Istiklal Street, which is, I suppose, the most crowded place in Istanbul. This district never sleeps :-) however, the apartament is a quiet place. Thank you Isik for your hospitality. Good luck!