Ceyhun's place location is OK, it is at the edge of the nice luxury - business centric neighborhood & a little bit tricky neighborhood. It is very close to the main shopping and business centers.
The place itself is 2 bedroom, accurate as listed. The only problem was lack of AC as it was very warm when I stayed there. The place was not clean or tidy enough, I didn't have any hygiene concerns but there were left-overs in the fridge, bathroom was not spotless clean. I didn't expect to see lots of Ceyhun's personal belongings in the apartment, he left his towels & toothbrush etc. And there was a constant problem with the internet connection.
Ceyhun seems like a good person, he waited for me for the check-in in the night and send me regular messages to see if everything is alright.
Overall, if you are OK to stay in a couchsurfing style apartment, it is very convenient to reach central areas. But if it is a business trip, you can double check the wifi connection with Ceyhun