Pros:
Park Setting - I absolutely love park-style courses, though I prefer a few more mature trees than Exposition Park provides. The park is well-maintained and clean. Sidewalks were in great condition. Grass was mowed. Landscaping was excellent. Exposition park is an aesthetically pleasing place.
Water - The course plays around a small creek and over a feeding pond at the back of the park. There is plenty of challenge, especially on windy days, and for out-of-towners who are not used to the additional disc stability from the elevation .
Pin Placement - The best attribute of Exposition Park, in my opinion, are the pin placements. Lots of risk/reward. Most are tucked fairly close to the water. Birdies are available, but aggressively going after that 50-foot putt can really mess you up if you're long.
Baskets/Pads - Baskets looked to be in good condition and all caught well. Pads were awesome. Very large providing plenty of space.
Cons:
Redundancy - The course is so open that you can simply throw your preferred line off of every tee. For me, I was simply throwing gentle hyzer after gentle hyzer. You could easily play this course well with a driver, a mid and a putter.
No Tee Signs - Crossing back and forth over the creek as much as you do, it would really help if tee signs were there. Directionals pointing to the next tee at each basket would also be fine, but we didn't see any of those either. The pads have hole distance written into the concrete, but signs would be helpful for navigation.
Hole #1 - 'welcome to our course. Please throw ~270 feet in front of you with no obstacle of any kind'. That's really Hole #1. Nothing that gets the blood pumping for an exciting round. In my opinion, you should NEVER open or close a course with the most bland hole.
Goose Poop - It was everywhere. Tread carefully.
Other Thoughts:
Exposition Park was a fun little stop since it wasn't far from the hotel. We were told it was in the "bad" part of town, but it didn't look too rough to me. I've definitely played in much seedier areas. Bottom line: the course is wide open, and really not that long. The only challenges are provided by the presence of water on most holes and the wind, which seems to get a little crazy at times.
While it was very short, #18 may have been my favorite hole in the Denver area. It is a great closing hole despite it's lack of distance. Water on the left of the fairway and long. A couple of planted trees in various parts of the fairway, though none over 8-10 feet in height. If you're up by a stroke, it can be intimidating knowing that you really need to birdie the hole, but the difference between a birdie and an OB bogey is very small. Great little finishing hole.
If you're in the area, Exposition Park is not a bad place to get in a quick round. The park can be a little crowded, but not nearly as crowded as Johnny Roberts or some of the other park courses in the Denver area. Don't go out of your way to play the course, but I don't think anyone would "hate" playing it, if it were convenient. It is a "typical" course, with water and pin-placement balancing out the wide open nature of the park.