I went yesterday. Really enjoyed it, though I preferred the live action arena last year and the year before when it was longer and straighter. There was a much better, closer view of the action, and maybe higher speeds. I also thought the selecion of live racers was less impressive than previous years(the Stratos and Quattro were ace though!).
I also had a ride in a Caterham 7. Lots of sideways and screaming tyres. All done in 1st gear too. I came home with a face and hair full of black rubber and the smell of burning tyres in my head!
Some great static displays too - Pistonheads always have a good selection. I'm not really into the trade stuff, tho I like the memorabilia stalls. Didn't see as many diecast stalls there this yr as previous years though. I'll probably go again next year, depending on whats on.