Pros:
Fantastic in every regard. Every hole provides a different challenge, with drop-offs in various directions, various lines, and every elevation change imaginable. The trees are old, mature, and impossible to throw over, which forces even the most powerful arms to take the traditional routes.
This course has received some love recently - there are pretty new Mach X baskets and, finally, new tee signs. There are 2-4 pins on every hole, and also two extra-long baskets that you can play to for a longer hole (holes 1 and 12). Those pins give the course a ton of variety and make there virtually no need for alternate tees. Most of the time, some pins open up lines that would be otherwise impractical.
Most holes offer multiple lines, especially depending on pin placements. Hole 12 is a good RHBH roller hole, hole 9 has numerous possibilities, and even on a lot of upshots, there's danger because of rollaway potential or tricky stances. Some lines are shots that are difficult to find on other courses; on hole 7, you're squeezing your disc between the hill and a low ceiling, and a few pin placements force you to manage speed to not blow by the basket going downhill.
There's out of bounds in play on several holes and adds to difficulty and risk-reward potential. For beginner players, just play everything in bounds - this course is difficult enough already. For everyone else, the roads add death putts and potential for aggressive shots that will punish you if you miss your line. The pins can change up OB challenge a lot too, with the long pins on 8 and 9 bringing the path into play a little more, and long pins on 14 and 17 being a little closer to the roads.
Rollaways are common if the angle of your disc doesn't match the hillside, which can be punishing. This can be a con for new players, but it really keeps you honest on ~70-foot upshots, which would be routine on flat ground. Drives that would be commonplace for advanced players will be tricky due to discs speeding past baskets and tough putts that will be produced by hills or OB.
Cons:
There's a bike trail that winds its way through some of the course. In my experience, there are not many people on it, but it does come into play on around four holes, depending on pin placements.
The only thing missing to make this a truly world-class course is more par 4's and 5's. A couple of long pins can be par 4, but in reality, it's a par 3 course.
Can get muddy after rain. There are also a few steep hills off the fairways (mainly, holes 3-5) where lost discs are possibilities. Watch any discs going that way. Fortunately, the first row of trees usually stops anything coming in.
Other Thoughts:
This course is not for the faint of heart at all. The hills will get to you instantly, so bring plenty of water.
It's amazing this course has survived for so long and is still so amazing, despite trees and limbs that have fallen down in the last 10 years. The original designers did a fantastic job.
League night is Thursday evenings in the summer and is one of the most popular leagues in Kansas City. If you want a quick round, come sometime else.