I was intending to go on Friday but having read your review I don't think I will bother now as the new Guzzi was a bike I wanted to see along with the new Honda Hornet and Transalp. It sounds an expensive day out to look at motorcycles that I can see in my local 5-star Honda, Kawasaki and Suzuki dealer (HGB) next March for nothing!
I went to the MCN London Bike show at Excel last January and that was pretty bad, you couldn't get near the bikes and the products being sold by the small stall holders in the hall were more expensive than on-line (it just highlights the costs of the rents in the show hall).
Add in expensive drinks, food, travel and entrance fees (and no free goodies as you used to get at the old Earls Court show) I just dont think it is worth it any more.