Ali is the host you want to have for your trip. Very nice place, good location (in a great neighborhood in a tourist area, very close to cevahir mall and about 20-30 minutes walk to taksim (if you like to walk, the places you cross are beautiful).
Ali invited me to dinner once with his friends which was awesome and a lunch which was perfect. He was very friendly and I didn't feel lonely at all. I hope to see him again and recommend his rooms to you.