I've been to 4 or 5 of these events. In my opinion, the chap who is currently presenting these isn't anywhere near as good as his predecessor.
I found the first couple I attended useful, as I was a student/new PPL at the time. Since then though, I find it really frustrating that the presentation is identical each time - exactly the same slides, same 'Who's been framed' style video clips etc etc. The most recent one I attended was April this year - prior to that it was January 2002 - exactly the same. Don't think I'll bother next time.