The most disgusting thing was the smell of cat piss everywhere. The whole apartment was soaked with it, so by the end of staying it felt like my clothes did too.
Another disappointment was the lighting. The apartments were very dark, there was barely any natural lighting. And the internal one was not enough.
The last, but not least, bathroom did not have any heating, so it has to be open all the time to get some warmth from the bedroom.
The host was nice though.