The door is almost impossible to open without explanation. Host don't provide explanation, we were stuck for almost an hour, outside, at 3am, trying to open the door of our room. The host should had an explainer to do it, because there is a lot of people having the same problem in reviews. To people reading this while blocked, you should try to push the key up, not fully entered, and turn left. Good luck.
Apart from that, the apartment is great.