Pros:
A challenging short course that rewards precision. It is nicely landscaped and several holes, notably 3 and 7, are quite picturesque.
The course is isolated from other activities in the park, so there are no swing sets, swimming pools, picnic areas, houses, etc. that could interfere with your round.
Good signage and easy to follow from hole to hole.
Cons:
The course design is too tight. With all the available land (they're planning to add another 9 holes) they somehow designed the holes very close together. As examples, if you overshoot the 3rd basket, you could easily hit someone on the 6th tee (I almost did). I was nearly hit on the 4th tee by an errant 3rd hole tee shot (the shooter couldn't see me). And the 5th basket is only about 10 feet from the 6th hole fairway.
Mosquitoes can be bad. I've played several times and on one occasion the mosquitoes were as bad as I've ever experienced.
The rough is harsh and can be intimidating, with thick thorny bushes in many spots. Losing a disc is a distinct possibility.
Other Thoughts:
Lots of blind tee shots, as only on the 3rd and 7th tees can you see the basket. While not objectively bad, my preference would be for fewer blind holes.
Overall, a vast improvement and much nicer course that the other Mundelein course (Leo Leathers Park).