In the cold season heating system was lacking power. Metal window frames are leaky and induce condensation. Inconsistent rules and rule changes during the stay. Conditioner was noisy, maybe broken, I was afraid to use it. TV stopped working after first day of the stay. CCTV camera was on all the time in the terrace. The flat has no other means of ventilation, other than opening windows, even in the bathroom, and by the house rules all windows have to be closed when leaving, therefore when one leaves flat remains not ventilated.