We went last year, it's good. Lots of different marques and an opportunity to speak to suppliers about all sorts of modifications and extras. You won't find much JDM stuff but lots of manufactures, in particularly Uk ones where you can pick up all sorts of extras. I ordered by HEL brake lines from them for the MR2 at a bit of a discount.
The auction was good last year, they had the Shelby Gt500 Eleanor for gone in 60 secs, went for silly money.