I rented this nice! apartment for my team members during a business trip. One of then had to go on a hide and seek adventure of about 40 minutes to find a key, then call someone, and find the actual apartment. We knew beforehand there would not be a host waiting for us, which did not seem a problem to me. We decided since there was nobody waiting we could go to the apartment when we finished work (we finished work in the middle of the night). We did not know beforehand there would be a phone number with the key. Otherwise we would have gone to the apartment earlier and avoid waking someone in the middle of the night to convince them we are actually staying over. The key system is not the best way to rent an Airbnb.
But the apartment was spacious and nice to stay.