We stayed just one night of a planned five night booking, and we would not have done that, had we not arrived late in the evening after more than 9 hours of travel. The problem was the drainage smell, which other reviews have mentioned. It was very strong when we arrived and pervaded the whole apartment. There is clearly a problem in the bathroom, which I hope the host remedies before anyone else stays.
This was our first, really poor Airbnb experience in over 30 nights. It highlighted to me the need to avoid self check-in, as a guest has few options once they check-in and enter premises.