Sure the demos are cool to watch but then again they are performed by real performers. The only magic you will see if the removal of money from your wallet if you are dumb enough to actually buy any of the tricks they are selling you.
Like a fool I purchased the Arne rising card deck after seeing a demo and being assured that this was a trick for beginners. The packge states no sleight of hand required and that the book has everything you need to master the trick.
All the book does is tell you to buy other books and nowhere is there any hint of how you actually perform the trick(s). What a rip-off.
The only trick I have learned for my $25 purchase is that I should have vanished from the shop as soon as the pitch started.
I don't know how staff sleep at night knowing that they are stealing from their customers. Perhaps that is just Vegas for you.