Hi - I know I'm late to post but I wanted to chime in with the others who said they were nice and friendly. I met them last year after the San Francisco concert and they chatted with and signed things for the fans after. I'd been to a signing for the release of "Catalogue" the day before and frankly it was rushed and horrible, so I'm glad I had the chance to meet them in a more relaxed way.
Anyways, I'd journaled the whole thing while it was fresh in my mind so you can go here and read all about it if you want. (It's kind of long and corny.)