We had some trouble with the self check-in. Provided codes weren't working at all. I really appreciate how responsive the host was because we check-in late in the night (~1am). Host wanted me to show him all the steps I was taking many times in exterior and interior doors. In the end they opened the door remotely for us. I think they could have done it immediately because it was late, a bit cold and we could sort it in the next morning. I also didn't like that in the morning of your checkout, someone entered the apartment without permission with her own keys. She apologized but still a big mistake... It's something that I'm sure the host can fix with next guests.
Besides the negative points above, the apartment is very clean, modern, comfortable and has everything you need for short or long stays. You can easily walk to all main city attractions from there or, if you prefer, you will also find public transports stops near. I would choose it again for comeback in the end.