Pros:
Initially listed as Schaumburg DGC, this 9 hole, dual tee, city park course with plenty of water in play is now Walnut DGC. The property used to be a par 3, 9 hole, ball golf course and as such is largely flat with sparse mature trees. Those shortcomings are partly offset by the large pond, smaller pond, and basket placements that take full advantage of what elevation change exists.
It's clear from the first hole that this isn't your normal Chicago suburban 9er. The first 4 holes play adjacent to the main pond with forced carries from most of the long tees. Hole 8 also brings the water into play (much more so from the longs). The 4 holes without water in play are a nice break from the disc loss risk. The course strikes a good balance in this regard.
I'm impressed with the design. This is not a large park and the ponds eats up half of the space, but somehow none of the tee shots really feel like you're in danger of pushing the property line. Additionally, looking at how few trees there are, I was expecting ho hum golf outside of the water danger. Surprisingly there are only a few holes that allow easy rhbh hyzer plays (and most of those have water in play).
In most cases, the shorts require mostly straight throws while the longs up the variety a bit. Long 3 and 8 play as par 4s and both are solid. Hole 3 long plays as a very slight dogleg left where you tee from OB and aim to land on a fairway bordered on the left with the large pond and on the right with a few mature trees and an OB path. Big arms could absolutely go for the green from the tee, but the green is pinched between the water and the path much more than the fairway. The first throw on hole 8 long is completely open (unless you push long), but has water all down the right side. The second shot is through a gap in some moderately sized trees and across a narrow stream/pond. There's a mando to prevent players from throwing over the water and 3's basket from the tee to reach the 2nd half of the fairway. That shot isn't available unless you can throw an almost 400' rhbh hyzer, so at least there shouldn't be many tempted to ignore the mando.
Equipment is generally quite nice featuring DGA Mach 7 baskets (with painted rungs to direct you to the short and longs tees, descriptive tee signs (at the longs only as of my last visit) and two large flags near the main pond to help with wind reads. While the tees are concrete and level, I would have preferred them to be a bit longer.
Cons:
The biggest con for this course is the property. There was only so much that can be done with a largely flat, small parcel with few trees.
Even from the shorts, this course could be very frustrating for beginners. The chances of losing a disc out here are pretty high. Lots of water in play and it's far from clear with a bunch of debris on the bottom. This course is quite exposed to the prevailing winds and it's been fairly gusty 2 of the 3 times I've played.
As mentioned above, the tees could use to be a couple of feet longer. In most cases, there's relatively level ground behind the tee to extend your runup, but a couple have a slight rise starting immediately behind the tee. Starting behind the tee on those holes would result in an awkward run up and I'm curious to see if water accumulates during the wet season.
In this part of the country, ponds mean geese and you'll encounter the evidence. I've definitely seen worse though.
Other Thoughts:
While it might seem like we are tripping over courses in the Chicago suburbs, this one lands in one of the few holes on the map. It's also the best 9 hole course in a pretty wide radius.
If you're not a consistently accurate thrower in varying wind conditions, do yourself a favor and bring a few discs that you wouldn't mind donating to the ponds.