Unfortuntaley , I did not recieve my code in time for checkin and the host did not answer all telephone, I had to wait 1 hour before I gave up. AirBnB also have it in their policy that they have to wait an hour from then they contact them first to get a refund, so I couldve ended up waiting 2 hours. I gave up and found another accomodation nearby.
The booking was confirmed instantly which was too quick for human interaction, which makes me wonder about the hosts awareness of the booking.
Anyway the host eventually responded late that night to apologise and had no issue offering refund. Assured me it was the first time it happened.
Im not saying dont book with him, Im just saying confirm in good time you have access to the code and room