Well as requested here is my 9t 35a combo installed in my 4wd offroad.
MR4-BC belt drive.
The install was easy.. size was great.. start up is good.. I used just the default settings and I would not say it JUMPs.. but maybe thats the fact that the motor is not super over powering for the car.
I took it out and ran it.. I like the power.. the acceleration is good.. not stupid.. but this is going to be better than the brushed motors I am running.. so I think for what I paid.. I am going to be very happy with this.
Tonight it was about 10º outside - and I ran it up and down the street pretty good for 7-8 mins.. I picked it up and put my finger on the motor.. just warm.. so vents are working great.. yes it wont be that cold racing.. but I was zoom-ing er.. and not past warm.