I ran mine in my Fusion 1/8 buggy at a RC Pro Series race at Real RC in KC. I ran it with a Neu 1509 2y on 4s and it ran really nice and smooth, and temps (was about only 70* that weekend) were very good... similar to what I got with a MMM and what my buddy was getting on his RX8 system. Previously I ran a MM with Koolflight Ubec... tweaked to install very cleanly in the buggy without a mess of wiring. The MMPro was a dream to use.... the same clean install without any work.
I was planning to run it with a sensored motor in my 1/8 and also race it with sensored motors in 1/10 buggy, but mine didn't survive the weekend at the big race. I believe it blew a brake fet... died coming into a corner hard on the brakes. So my MMPro went back to the bat cave with Castle Mike. I finished the weekend with a MMM, and it's been in my car all summer since then. I didn't get a second gen beta unit, so that's all the experience I got with it.
It's an awesome little speedo and I can't wait to get another one. I think it will be good for a light 1/8 buggy that's set up for racing, which means not overpowered 50mph type of setup. In that case, the MMM would be a better choice. The MMPro size fits AWESOME in my Fusion, and I don't run a crazy fast car so it's perfect for me.
Although.... after running a MMM in my car all summer, I have grown to like the install and look of it in the car.
But when the MMPro arrives, the MMM won't see it coming
