I have both mmm and HW150, both in ofnas one offroad and on oval. I will say i think strait from the both the HW combo was a bit faster and scarry to some level. I threw off the premounted ofna bones tires while running it on offroad. I have ran both cars with a limited number of packs through them but have burned up the HW motor. DId a good job id say the shaft was able to slide out of the motor i got it so hot. But plugged in another milder motor and the thing works. Both battery cut offs work well and plenty of tunability...even though more with the program card from HW. Which alot of the other drivers saw as a very clever idea compared to the MMM. I do like the size of the MMM and can align it in the car easier than the HW and like the beefyness of the MMM combo motor. Just too early for me to do to much more since i am running my big car too