I'm loving the Pandora so far. It does look a little clumsy to hold but I think it's just because my brains equating the keyboard as part of controls so it looks more awkward than it really is. The GP2x didn't do haf as well as it should have, if it was from a big company it would've been a massive seller. Still shows how strong it is, usually consoles with no 3rd party support die immediately but they haven't.
I love the GP2X F200. Its a great machine with a beautiful screen. In many ways its the best portable emulation device on the market (for now). I know PSP can do more, and in some areas it excells, but the F200 has a screen that old school games look fantastic. Plus it has AV out that works on almost any TV.
I have great hopes for the Pandora. I've been following its development since it was first announced as the Craiginator. I have no doubt it will become the best emulation portable on the market. Even though it is a big on the large sided.