I went down last year and I thought it was a good day.
Some quite amusing sights such as the Mondeo owners club (full of chav dad types) and the concourse stand (which I love, but you have to laugh at some of the owner types, for whom Ford Fair is perhaps one of the few times they get out!).
If you have been to French Car Show, you will realise this is actually a much broader show and how Silverstone absolutely kicks Rockingham into touch as a venue.
Thinking about it, I far prefered Ford Fair in 2010 to French Car Show this year.