This is one of the worst experiences we have had in over six years of both hosting and staying as guests on Airbnb. We had to leave early due to the following reasons:

1) There is a mouse (or more) that will come out, especially at night, to roam around the apartment (due to the unclean nature and state of the flat, surely this will not cease).
2) When we contacted them about various issues, the two sisters who live here stated that things were just the way they are, that there is nothing they could do about the problems (i.e. the below mentioned missing toilet seat, and that the mice were there before they moved in, so they could not do anything about it, etc.).
3) The dirtiness was beyond anything ever experienced - there was urine on the walls of the bathroom, dust and grime everywhere, it seems like this place has been lived in and never cleaned in years.
4) There was NO toilet seat on the toilet. There was a broken one nearby you were supposed to balance on top of the toilet when you wanted to use it.
5) Furniture is completely different than the ad - it is cluttered with random pieces of furniture that make the space much smaller (i.e. four coffee tables in the living room). The furniture also does not match and feels like it was all gotten from a thrift store.

Above and beyond, the hosts (2 sisters) literally showed up when we were leaving to yell and scream at us when we were leaving early. They had no apologies throughout and then felt the need to actually come confront us when we left. We were shocked by such behavior. The fact that they did not see a problem with any of the above is concerning. More concerning, however, as I stated, is the fact that they literally verbally accosted us on the way out.

Location is great and balcony is great. The place needs a cleaning beyond what would be a deep cleaning, it needs to be emptied out, refurnished, mouse proofed, then cleaned for hours on end. We cleaned the bathroom walls ourselves, kitchen ourselves, etc, but everything just had a dirty film all over (and half empty cereal boxes, candy bags, etc sitting around the kitchen, which no doubt leads to rodents entering the flat at all times).

Having stayed in many, many flats in the neighborhood, I would definitely warn to seek another flat, and we were very happy after leaving and moving to another.