Pros:
The course is very outdoors oriented. It is as much like a hike as it is disc golfing once you're on holes 3 through 11 (the lower nine).
It is a very challenging course overall, but besides the lower nine they are akin to most other courses. The top nine can be played separately if you aren't looking to go for the hike, though I think this takes a lot away from the overall feel of the course.
The course makes great use of elevation.
There are tunnel shots, holes bending right and left, uphill and downhill, long bombs...essentially covering most types of throws.
The top nine have two tees. A second tee isn't needed for most of the lower nine, and the only one that does, has one.
Water come into play on several holes.
There is a small shelter about halfway through the course. (No water, restrooms, etc. but it did have a table to rest at)
There are bathrooms in the park.
The course has never been busy when I've been there.
Poor throws are punished.
Cons:
It is VERY thick in the summer, so it's easy to loose discs if you aren't accurate.
If you have a bad hole, it might be enough to make you decide to play the rest extremely cautiously, taking away a great deal of fun from the course.
There are multiple water crossings required for this course, most of which don't have a bridge. They are across a creek, so it can be walked easily, but this is not a course for sandals. Waterproof boots are fine for most of it, but depending on rainfall it might still be over the top of most recreational hiking boots. We usually just do it barefoot since most of them are paved road crossings.
The course doesn't handle rain well, though it wouldn't be anywhere near the same experience if it did. Plan to come out when it hasn't rained for a few days.
Other Thoughts:
If it has rained recently, you probably shouldn't play it.
If you don't like hiking, you probably shouldn't play it.
If you don't like a hard challenge, you probably shouldn't play the lower nine.
I think this course is a lot of fun, though it is very challenging. To par the course would be extraordinary, as there are only a few that offer relatively easy birdie chances. To truly experience what this course is like, the lower nine holes must be played. Be prepared though. I bring plenty of water and a few snacks as well. Power, accuracy, and shot selection are all needed to do well on this course, and missing one of them for only one hole can be devastating to your score.
Hole 3 is really an incredible hole. It isn't the most difficult throw, but throwing over the ravine is intimidating and makes it feel amazing when you drop it right next to the pin.
Check the link section for a map I found. It will make finding tees much easier, especially holes 3 through 11. The map came from iowadg.com, so give credit to whomever posted it there.