I've been a couple times, it's a pretty good show. Lot's and lot's of product, you can play with all the SUPER expensive lens and camera bodies, and there's generally a lot of new gear to check out.
They have 1 hour teaching seminars running all day, lots to choose from because they have 5 going at once (3 rooms, 2 stages in the show floor). They sometimes have some great info. Some of them are basically advertising for a product, but I picked up some great tips.
Just don't be afraid to walk out and check out another one if it's not what you thought it would be (that happened a few times... make sure you sit by the door!).
A little tip for those in the TO area, if you sign up for Henrys e-mail newsletter, they send a free admission ticket each show (they're the sponsors).
Have fun!
Jason