The apartment was fine though, there was one night that we've met terrifying situation but the host respond none to our confuse: there was someone ringing our doorbell twice, and tried to open our door by some tools, we yelled to him and opened the door to see what's going on, then the guy ran away by stairs. We texted the host immediately but he didn't reply anything at all.
At the last day of our stay, the electricity went out throughout the whole floor, and the water often turn cold and freezing after 11pm.