Very good acoomodation in a very nice area. The location is near the most important sights and has a metro and tram in walkable distance.
The best feature is the host tho. He gave us a free tour through Istanbul with some very nice tips. Also very helpful and very quick with answering.
The price is very cheap for what you get with Kalen.
Will definetly rebook when I come back to Istanbul in the future.