Despite playing in Chicagoland for 18 years, I still hadn't made it to Fel-Pro. This is a great course if you are in the northwest suburbs, it just happens to be about an hour from my house and not very convenient. In this area, it is one of the best.
The course has good challenge on the more open holes at the beginning and end, with rolling hills and some mixed in tree obstacles. However, the real challenge is in the woods from hole 3 through about hole 13 in particular. Fairways are fair, but challenging, with some tight shots and plenty of tree hazards. The most raw beginner may get frustrated here, but most players will have a great time. The hole lengths are very well suited to a quicker 18 hole round, but one that will still make you work for a good score. Most holes are in the range of 200-350 ft.
There are only single tees and baskets here, which is fine. The turf tees are not my favorite, but are in really good shape as long as it is dry. Finding discs is generally not too bad, though there are some taller prairie grasses on the open holes, and a few places with thicker rough in the woods. The one thing to watch out for are a few of these crazy trees that look normal enough, but have huge 4-6" thorns growing out of them all over the trunk. I've never really seen trees like this and I would not want to run in to one inadvertently. I can just see walking along, entering a score on my phone, and losing an eye/whatever to these things. Pay attention
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The equipment here outside of the tee pads is very good. The course is popular and does tend to get crowded. There was plenty of waiting on a Saturday afternoon for me, but I still played the course in just over an hour since most people let me play through solo. Some of my favorite holes were 13 and 18. On 13, you are throwing a long 475 foot fairway through the woods with a pretty hard dogleg right. Getting through all of the trees to the more open last 100-150' is a good challenge - one I succeeded at, only to take 3 more strokes to chain out :-|. Hole 18 is Fel-Pro's version of "Top of the World." It might not have anything on the California/West Coast versions of this, but it's a cool final shot from elevation on a 375'+ hole with lots of open space to see your disc land. If you REALLY overthrow, this is the one place you could nail someone on the walking paths, but otherwise this isn't usually an issue. There are a few blind tee shots where you cannot see the group in front of you finishing the hole at all, so be aware. I think more courses need to adopt the "dinner bell" system where the prior group can ring it nice and loud when they are clear.
Navigation was flawless and very clear overall. The many indicators were much appreciated. Overall, this is a very nice park, and looks like a nice place to visit for non-disc golf activities too. I wasn't blown away by the scenery, but it was good for Chicago. I highly recommend a quick 18 here, though if it were me I'd try to hit it at 6 or 7 AM rather than on a Saturday afternoon. No water in play, so you'll only have morning dew to contend with.