Where to begin: Host sent an email demanding PII (personally identifiable information) in a non-Airbnb app. It was awkward to be prompted this and I didn't enter my info on this separate app. When I contacted Airbnb, they confirmed that host cannot deny checkin on the basis of a guest declining to login to a host's non-Airbnb platform. The checkin experience was awkward, as I ran another group checking in and they said that they were told if they didn't login and enter their info in said app, they would not be to checkin. This woman confirmed that she was prompted for her credit card upon logging into the app and now she wishes he hadn't done so. When I engaged the front desk employee, she asked for my driver's license and took a photo. After extensive discussions Airbnb support to ensure that host not retaliate for my electing to opt-out of using the host's weird non-Airbnb app, I was able to checkin. The whole checkin experience was a nightmare and I wish I simply booked the Hyatt next door. All the stress even after booking early and paying through Airbnb was just a bit too much for me. No stay is worth that much coordination and pre-checkin friction. They have some sort of hpspitality business they're trying to build on top of Airbnb, but it's very awkward and impersonal.