Proximity to the airport.
It is written online that check-in is possible until midnight. I was there at 10:11 p.m. and was then very rudely informed that check-in was only possible until 10:00 p.m. The communication did not take place in person but via an intercom. After a digital discussion, I was finally allowed into my room, where I found a dead cockroach on the floor and the bathroom was filthy.