Mert's apartment is good. It is located in the Istambul downtown, which means that you can get to the most tourist attractions by foot, or by using any public transport of your choice. Meet is a very good and communicable person, he help us a lot, answering our questions within short period of time, usually 10-15 minutes max. I can recommend his place to anyone who likes to cook on his/her vacation from time to time and for people who would like to live in a center of Istambul.