Pros:
The reason Johnny Roberts is the most popular disc golf course in the Denver area is that it's flat out fun. Most holes are reachable for birdies and at least two holes, 10 and 11, are always ace opportunities. Risk/Reward high with OB on every hole: street, sidewalks, skate board park, basketball court. Basket placements near Ralston Creek, so lots of death putts. (Miss and you're wet.) If you throw straight as an arrow and stay dry, several strokes under par is possible. (Putting is the key to scoring well since all baskets are reachable.) Big bonus: If you play off peak hours, you can play a lot of holes in a very short period of time. Mile High Disc Golf Club, the City of Arvada and Tom Hamilton do an excellent job of keeping the course fresh with different pin placements and park maintenance.
Cons:
TRAFFIC: Be aware it's a mult-use park so watch out for walkers, bikers, kids, dogs, strollers. If playing in traffic bothers you, Bird's Nest or Badlands are better choices.
Other Thoughts:
Sunday morning random doubles is a Denver tradition. You may get paired with a top pro, or a beginner, either way, always a lot of fun.