I'm happy with the sound quality, but I didn't really "perform" for the camera. I'd like to make another set of videos with more eye contact with the camera. I was going for more of an audio demo this time ... just to test out the camera. It's very easy to use - I like it a lot! I'll see if anything is worth sharing.
BTW - I did manage to sell the 4x last night, so I'm glad I didn't take it out. I've got another (backup) PA900 on the way, and some lunch money to boot!