I went last year. It's alright. I was surprised at how little they have to re-do things.
My legs absolutely killed though, on your feet for a few hours not moving much apart from when they change position in the studio
I got on TV, was quite lucky, was at the back for most of it, then when they moved to the next segment, I happened to be right at the front without even moving. I was on TV for a whole 2 minutes
No, not even close. If you even touch any of the cars they moan at you and come out and polish them again