The room at rooftop, it's quite cold in Feb. I'm not expected the room's heaters only turn-on in daytime from 7:30am, but turn-off at night, ~11pm. I suggested to swap the heaters on at night instead of daytime as travellers may probably conduct sightseeing in daytime. And, the room door can only be locked outside. So, when I was inside the room overnight, i felt unsecured as the apartment were living together with other guests & also the owner. But, it could be locked if you go out. If you don't mind these issues, it may be fined.