Yolo Hostel is comfortable and in a great location. The staff allowed me to upgrade my room on the day of my stay so that my friend could also stay with me, and this was fast and smooth. Staff were available for help and questions 24 hours a day, and gave helpful recommendations about the local area and public transport. If you come to Istanbul, I suggest staying here at least one night of your journey, as Kadikoy is very artistic and relaxing.