12+ all the way. Really made to work around how you work instead of vice versa. Can be crazy complex or stupid simple... your choice. If it doesn't do something you need or want it to do, contact Jeff. It'll likely be able to in short order. I've had features added on each of the 3 FAMC products I own (old LF Pro, Liquid Tracks, 12+). In fact Jeff just added a feature to the 12+ a week ago that was requested a few weeks back. I've had nothing but excellent service. Add to that the fact that it's way lighter and cheaper than a MMGT and it's a no brainier IMHO. Then there's the cherry on top that a wireless add on is in the works. Both the LF+ and MMGT lines are miles ahead of the MFC in pretty much every way. I was originally on the waiting list for the MM, but while I was waiting it became a 2 horse race, and one of the horses was and is cheaper, lighter, and constantly getting better at a rate similar to the AFX.
The 12+ has really streamlined my pedalboard in a serious way, all while adding functionality. I swapped out my LF Pro with the 12+ the day before a gig and had it running way smoother than my Pro in nothing flat. Might I add that I was extremely happy with my Pro setup. I would take it over the MFC. The 12+ is just way better. I'm doing more stuff with fewer buttons and it's far more intuitive on stage during a gig. I was extremely impressed. I actually decided against a second 12+, which was my original plan, as the flexible layout really allows you to do way more with less, without things getting too complex on stage.
BTW, not bashing the the MFC. It delivers about what is usually expected with a proprietary controller. It's by all accounts rock solid. The MMGT and LF+ just came out a bit later and upped the ante significantly. I'm sure the MM is also a solid product, but I'm fairly sure, although my crystal ball is currently being repaired, the functionality of the LF+ is and will stay well ahead while being cheaper and lighter.
All IMHO, YMMV.
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