A number things went wrong during the stay and we had to find another place to stay at the end as we could not bear living in the apartment anymore. Of course, the landlord refused to refund the unstayed part.
--Hot water went off twice during the stay and we could not take showers.
--Wifi was so slow that even browsing would not work.
--The other part of the house was under construction during the whole stay, noisy and very inconvenient.
--One bedroom was converted from a living room that is just next to the street. So the window could never be opened as people could just jump in. And you will always get woken up in the morning by cars outside.
-- There was just one window that could not opened at the back essentially, so the air is always stale in the place, making it terrible to live.