Compared to all other Airbnb properties I've stayed at, detailed information about check-in and check-out was sorely lacking. We didn't know until the day that an exact check-in time was required. I found it uncomfortable having to enter a busy building entrance to meet 'the cleaner' as I had no idea who I was even looking for.
The cleaner told us what floor and room and left within a few seconds. There wasn't any information about where the car park. I was not feeling at all relaxed when I finally made it to the room.
The apartment was clean but smelled very strongly of cigarettes. All of us were really happy with the beds, pillows and linen provided.
Check-out was a bit clunky, too. If you're using the carpark, you need the remote to get out. When I asked the owner they advised me to lock the key in the room and wait for someone else to exit which usually takes about 5 minutes.
Simply providing clear, written instructions prior to arrival would really help.