I hope to take the class some day...
I did get to ride my S1000RR at Infineon using the Rain, Sport, and Race modes. It was raining until the last 2 sessions. Hence me trying out the modes.
The Rain Mode is definitely not too limiting since I did feel the rear wheel break loose and got a bit of a scare there.
Race mode is awesome, allowing me to get on the throttle really fast... it's almost telepathic.
Overall... too much fun!