Pros:
The course plays through a very nicely kept park with lots of other stuff going on but an area devoted solely to disc golf. The fairways are mowed grass, and most holes have either wooded corridors with brushy rough or scattered trees and some tall grass. There are two sets of tees, making for a nice option for different levels of players, and about half of the long tees offer different angles and obstacles.
There is a nice mix of hole shapes and lengths that make for an interesting and enjoyable round. The course doesn't get stale, and makes you throw different lines to score well. There are multiple pin positions, and many offered different looks to the hole, if they're changed reasonably often that's a nice plus. The tee signs are basic but have enough information, including movable arrows to indicate pin position.
Cons:
The tees are a bit sketchy, they are paving blocks that aren't very well seated. Many have shifted and settled so the tees are no longer flat or level, making for some footing issues. The arrows on the tee signs are a great idea, but many are missing, something that's not as easy to remove might be a better plan. The fee seems a little high, it's by car so it's more reasonable if you go in a group, but paying $16 by yourself gets pretty expensive.
I'm not a fan of long grass as rough on disc golf courses, it's frustrating to spend time looking for discs just off the fairway, and it doesn't make for good risk/reward options. Even from the long tees, the course is a little lacking in length, a few longer holes would help balance out the course a little more. A couple holes play along a park road, which takes away from the feeling of seclusion.
Other Thoughts:
This is a fun stop if you're in the Toronto area, and worth playing. Beginners will find the short tees reasonable, though there is some thick rough to punish errant drives. More experienced players will find their short game tested, and will need to hit their lines to score well.