The apartment was very humid, because the water leaks on the wall in the corridor. There was not possible to open the window in the both of the rooms so that the blinds was installed just 10 cm next to window. So together problem with humidity and ventilation lead me to avoid all apartments in basement for future.
Communication and contact with Kaan was perfect, so I think if he will be able to fix the problem with humidity, it will be perfect accommodation. Also, if I can recommend him to put over the sink higher mirror (suitable for women) it would nicer and more comfortable. But this is just detail how he can make the apartment cozier.