I was at the Mexico City Airport and needed a place to stay that night. Alejandro's listing said instant book, so I paid for the room. But when I tried to call Alejandro all I got was voicemail. I emailed him, but didn't get a response. An hour later he responded, and told me that he wasn't at his house to let me in. Alejandro should turn off instant book if he isn't even at his house to let paying guests in.
I didn't get a refund and I had to book another room.