Well it took a lot longer for me to get around to than I first thought, but I posted a small video review of my G634XP J/P. The video is a little shaky because I was taping it with one hand and trying to mess with the machine with the other. It's mostly just me rambling about how it works, and a few issues I had. Nothing terribly exciting about it, but if you wanted a closer look at it, then the video might be helpful. I think I say 1 cuss word in it (d***) at one point, so if you're very sensitive then don't watch.
If anyone has any specific questions about it I'm happy to answer them.
http://www.youtube.com/watch?v=EG2uoteXNFA
-Stephen Saar