I am using the RE-11 as a track tire primarily for HPDE's. This is not a review to reference if you are looking for street use. Pushing the car to its limit feels comfortable. The tires have awesome grip and give the right amount of feedback to know how they are doing. They have a certain sound to their grip when cornering that you helps understand your steering inputs; they hum if you are gentle, sing nicely when they are happy, and start to scream if you are pushing the limit of traction. The steering feel is great since they feel planted but running a reasonable sidewall provides feedback of your body/tire roll through the steering wheel feel. These tires hardly roll the sidewall and are very capable so most of your feedback is audible.
I would definitely recommend these tires for track/autocross use. I have taken them on the streets as well but for limited miles. They are a great tire for driving enthusiasts. The only criticism is one that you have to expect, treadwear is quick. Being that I am tracking the car, I expect it, but are there comparable tires for traction with less expense? Possibly. But right now, these tires are helping me find the limits of my car and my driving ability. Buy them, they are worth it.