I have the jam man, too, as recommended by a few members here. But it is only a few months old, I actally put it back in its box, waiting for the weather to warm up so that I can leave my acoustic out all the time with the pick up installed to then use my new amp, new pickup, new jam man, and jam man footswitch.
But I was able to give things a go when it was brand new around Christmas. There's a lot to take advantage of that I haven't explored yet. For example, it is conceivable that you could go to archive dot com, pull up a show, download a track to your computer that you're interested in, and load that into the jam man if you have boughten an expanded memory card for the jam man. Then you can slow down the track and really learn the riffs to your hearts content.
Aside from that, it is just like the boss looper, except that the jam man has a LED for the track you're on, which is easier to see from standing height, and technically, with careful programming you could use the footswitch to work out a whole song including the changes.
Damn, I wish I was twenty years younger, when I still had tons of energy and motivation, so that I could really get into the learning capability of this looper.
At least Spring is almost fully here and I'll get everything out and start working things over.
I was all set to get the Boss looper, but Blob Weird, or someone, talked me out of it in favor of the jam man, and it was good advice.
Practice your right hand technique, that's where the talent is.