Joan seems to be a very nice person, but was unable to meet him. We did meet his father who was great and had a lot of patience while trying to communicate with us.
First, we left a piece of jewelry and are still trying to coordinate the return through Joan, but communication is slowing and concern is growing.
A last minute requirement for a cash deposit was sent to us, which left us short on vacation funds for almost two weeks before it was returned. We found out after the stay that Airbnb does not support cash deposits.
Overall, the apartment was very nice and close to the subway, which made local sightseeing very convenient.
I recommend staying here, but know the Airbnb policies and don't leave anything of value behind (anywhere).