I have a 2112 with the 2120 Artist firmware update. I used it quite a bit when I first got it a few years ago. I liked it best for just effects. I ran a Rocktron Plexi into it's effects return. I more or less stopped using it after I fixed my Rockmaster. I started using plugins instead.
I was checking out Leon's 2120 video a few weeks ago and the tones he was getting from it inspired me to break it out and dig into the effects a little deeper then record a tune with it. I pulled It from my rack and threw together a temporary desktop case so I could tweak as necessary. It actually has some great sounding effects in it.
A few months after I bought the 2120 I bought a MPX-1. Once again Leon's vintage rack gear videos inspired me to go beyond the factory presets and start editing. First I had to replace the battery which was a little involved since they are soldered to the pcb then I dug into Leon's video and the manual. I LOVE that damn thing, it's sounds amazing! I've been using that instead of plugins.
I was messing around with it this morning. I wanted to try something different this morning and used something really out there and got pretty surprising results. I used a little 5w Bugera T5 head which I ran into an attenuator and ran the line out into the MPX-1 then into my interface.
Here's the clip.