There was no water running in the flat and host (found out by us calling) tried to fix it but failed so we had to move at midnight with a toddler which was extremely upsetting and made us change the next day's plan entirely. But host was easy to reach and did his best to resolve the situation which we appreciated.
We ended up staying at a flat that's inconvenient for us and didnt look clean in my view but I might have high standards. Host did offer ro move us back to the flat when water problem gotresolved but we didnt want to take time and go through that again so we stayed at where we re-unpacked our stuff.
I do think this sort of thing is not common and can be avoided by simply checking prior to guests' arrival (which was unfortunately not done in our case) .Although I did not enjoy this particular stay, in overall I would recommend host's flats only because communication is excellent and even if something happens he will most likely solve it.