I have ESS. Most of the tunes are not adding top end HP. But getting more power lower in the revs. I really like the ESS. Very drivable. It is now fast enough that it is hard to open up often. Full throttle for 10 seconds and you are in the next state Don't really notice a change in fuel mileage. All depends how you drive it.

I would really like to see better brakes.

M