I am happy to be the first reviewer for this place. In short it is awesome!
If you need more detail, this was a really great experience to stay at Can's apartment — it is in Galata region, the area is safe, people are nice. The place is within 7-10 mins of walk from Galata Tower, where you can view the whole Istanbul from where the ancient rulers and sultans used to monitor the city. Also you have access to Shishane Metro station, which allows you getting anywhere around this great city.
The stay was incredibly flawless, from check-in to check-out: Can and his co-host Sebastian were very accommodating and communicative. This flat is a bargain for its price range and I would choose this place anytime.
Thank you guys, you are doing great! Good luck in you business and, if I am coming back to Istanbul, I definitely will choose your place.