PT, do you have or have you tried the "Pandora's Box"? I'm thinking about getting one from Santa, but haven't talked with anybody that's really played with one. Sorry for thread creep and thanks in advance.
L.E.,
Did you ever get the Pandora? I've had a PX-4 (the latest one) for about a year now, and it's the second best, guitar related accesssory that I've bought, next to my Traynor tube amp.
It sounds awesome, and Flash is right, the rythym patterns are great for improvisation practice, and are customizable for temp and key. I use it on the road as well as at home when the famly units are asleep. I've even recorded with it directly patched into my Fostex digital multitracker.