There was a mouse in the apartment.
I was there for several weeks and everything was okay, but one night I saw mouse in the living room (it got in through the heating pipes). This was on a saturday. I called the host and she literally said that she was out of town and there was nothing she could do, i had do deal with it myself and that maybe on monday she could try to get someone to put mousetraps in. I didn't want to be roomates with a mouse for 2 more days so I moved out, and she didn't want to refund me for the days I had left. The worst part about this was how the host treated the whole thing with total disregard and lack of respect. This is even worse when you are paying 3,500 a month.
The lesson I learned from this: when renting an apartment on airbnb, don't look only at the apartment features, also take a look at the host. Rent from real people, not a realstate agency like this that just wants your money and won't deal with any problems you might have.