There are soem bargains to be had, loss leaders as they call them, but much of the stuff on sale will be at normal or slightly discounted prices.
A mate of mine has been in the past and he came back with some crap. Personally, it's only 35 minutes away for me and I can't be bothered.
Saying that, the EA rang me this morning. They are having a stand and asked if they could use my number as a point of contact for TVAA and the issuing of day tickets. They must be expecting a lot there if they're going to that much trouble.
