Isik's place was great to stay at. It is very central, a minute from Taksim Square but on a quiet street. It's very easy to find and has lots of shops and a bakery nearby. It was clean and warm with a hot shower. It's perfect to chill in or just use as a base, we were out a lot exploring the city. Isik is a great host, he welcomed me into the place on my first day, gave me tips and told me how to use the metro card. He was quick to respond to any questions we had during our stay. Would definitely recommend this place (and city) to all.