I've only had my SRT6 for a couple of weeks, and have been having quite a bit of fun with it.
One thing that I was somewhat unimpressed with was the throttle lag from the Mercedes electronic throttle control (I know, I really need a Sprintbooster), so last night I was messing around with the "manual" autostick shifting, and wow what a difference, it's much more responsive. It's smart enough to upshift if you over-rev, but it's also fairly liberal when up/down shifting.
I like it!
What's next....disable traction control ?