I'm new to iPad and Apple products. Going to try the new jailbreak on my iPad 2 but I have one concern. If the JB doesn't work, crashes or stalls or if I don't like the result because there are white icons (whatever they are) or missing apps, or whatever, is there any real danger of rendering the device useless? I've seen posts that say you can just restore in iTunes. That's fine, I've made a backup, but is there any danger that I would not be able to restore back to factory defaults if the JB fails, stalls, crashes, etc etc etc?
Thanks

No.

And if there was, just take it back to Apple and exchange it.