Pros:
A lot of great variety in this course. Very few of the holes are repetitive, and there is no strong favor of RHBH throughout.
While most of the course is fairly short, it is a fun course to play. It is easy to have a disc go errant, and when you do, you are often punished accordingly. ;-)
Of most of the courses in the area, this one has the best variety and fun, in my opinion. Several of the holes have multiple ways to be played. Holes 5, 6, open up a bit, and 7 is wide open and you can let them rip.
Nice, full-size, concrete tees, and signage. The course map has had graffiti on it for at least a year. Not sure if it's been cleaned and re-tagged, or if it's been the same all along.
The park itself is very nice, well maintained, and has plenty of parking and shade.
Cons:
Crowded... for this park, it's a big con all around. There are often lots of disc golfers about, and many of them are not considerate of other players. While I've met several people who are great, there are enough at this park to make it really stand out.
The other issue with being crowded is that it is a multi-use park, and in some cases holes may be unplayable due to people on the course. Hole 7 especially has this issue. I've had people walking with their dogs and children go right through fairways without even a clue there's anything going on. This can be very frustrating, or even dangerous.
Hole 4 can get quite muddy, especially after recent rain. I know a lot don't like the number of trees on 4, but it's definitely playable, just gotta watch out for the creek, and mud. ;-)
Other Thoughts:
If this course was closer to home for me or much less crowded, I would play it more often. As it is, it is probably my second most frequently played course behind Central Park (due mostly to proximity).
It's a great course in design, and definitely worth playing. From a course perspective it's one of the better courses I've played in Northeastern Illinois.