Funny you posted this, I just ordered one from Amazon on Sunday due to their Black Friday sale.
What I did however is I ordered the Jam Buddy I. I know the JB-II has upgrades, drum patterns and a looper among other things, but I actually liked the simplicity of the JB - 1 better. Instead of me spending way too much time trying out different Amp heads, I just want to plug it in and play.
Plus, I already have a Digitech 360XP which has all those things and more.
I plan on just using the Jam Buddy as a portable practice amp I can use wherever. Brilliant Idea from JOYO.