I'm running a MMM in my ~16 pound Muggy with a 80mm MedUsa motor and it's been very reliable. I cooked one from doing a lot of high speed heavy braking and they had me a new one in about 2 weeks. I like it's throttle control 10x better than my MGM and the programming is great. So far it's been very robust for me, every time I get my Muggy running again it goes back to work making sure I've got more broken parts

IMO it's well worth the money, where else are you going to find a 150 USD controller this reliable, smooth, programmable, and backed up by an AWESOME 1 year warranty?