I booked and got confirmation for a Sonder room. The next morning, Sonder let me know they made a mistake and overbooked their rooms.
I was a little upset with this, but okay with it because the Sonder representative let me know they would refund my stay.
However, I followed up with Sonder multiple times requesting my refund, but they didn't respond. I later had to find a way to go through Airbnb where they would represent me and process my refund.
I had a bad experience with Sonder and recommend not booking with them.