This was my first time in Toronto and my girlfriend wanted to go to the AGO so I figured since we were a 10 minute from our condo why not?
The admission is probably the cheapest art museum I have been too and worth it. The steps to the fifth floor are really cool and better than the boring marble grand staircases most art museums have.
The Evan Penny exhibit was the best, his silicone sculptures are oddly lifelike and just weird but amazing at the same time. I would recommend to anyone with an interest in art, especially with their awesome student discount.
Oh by the way if you have kids, the museum is very well suited to families much more than any art museum in the U.S. this is coming from my girlfriend who works at a children's museum.