Pros:
A mostly open city park with good use of elevation and some technical lines. An enjoyable disc golf experience, especially if you like big open bombs with a few tighter holes.
Amenities. Shelter, playground, bathrooms, and plenty of parking (the upper lot was small, with plenty of parking down below).
Overall Variety. The front 9 has a good variety of open shots and tight technical shots. The back 9 has many mature clumps of trees that force more open lines. Elevation comes into play on many of the holes very well, with several big bombs off the top of a hill. Overall the holes compliment each other quite well, but it feels mostly like a big arm course.
Well kept. Littering seems to have been a problem here in the past as there's signs posted that tell disc golfers to please not litter. Garbage cans are provided and the park staff are constantly present, the course is very well manicured and kept looking nice.
Local Scene. Local leagues and tournaments are a regular occurrence here, the locals I encountered were all friendly and helpful.
Access. In the city, not far off the freeway it's easy to get to.
Other users. This area seems to be primarily a disc golf course, though the parking lot and road come into play.
Tees. Single set of level concrete tee pads are in good shape.
Signage. Decent signs read the hole number, and distance for the different pin positions.
Scorecards. I'll leave this in the pro section as there was a box provided for scorecards, though I don't know how well it is stocked as it was empty while I was there.
Cons:
Navigation. It wasn't always easy to know where the basket was or which basket to throw at. Hole 11 I ended up throwing at the wrong basket (the correct basket was to the right and shorter). Some areas a next tee sign would be helpful, or having a map posted at the start would be useful (maybe the scorecards have maps if they're available?)
I had no prior knowledge of this course and I was lost after the front 9. There was no indication after the front 9 where the back 9 was located, I ended up having to ask a local (obviously if you've read any reviews or the course info page you know by now how to get there and it won't be a problem).
Alternate pin locations. There was a list posted at the start to indicate which pin placement was in, unless you have a great memory or a camera, this information is hardly helpful.
Other Thoughts:
A very pleasant disc golf experience in St. Louis, if you like mostly open lines and watching the disc fly on big lines, this is a fun, challenging course worth the stop if you're in the area.