Pros:
1. Location is great, near to marmaray, ferry, and many restaurants.
2. Adem and his friend are nice and easy-going people, they let me stay an extra night (of course I payed for it)
3. room and the house was clean.
4. room has a desk and internet connection was good so you can work.
Cons:
1. room is in the basement, so you can't really enjoy sun light or even the daylight.
2. house is not well equipped so it may not suitable for long-term stay. you may visit the place beforehand.
3. bathroom and shower are not comfortable.
4. location is a little different so you should contact him to get the exact location before taking the wrong cumbersome uphill using G-map!
5. there were spiders at some corners( but he may fix it)
6. also the lights were not good, house is kinda dark.
overall it wasn't a bad experience, given the price.