Pros:
Although perhaps bias (having played this course when I was younger), I always really loved this course. The majestic cottonwood trees, the very real water traps, the vastness of all 18 holes with no overlaps, the buffalo, and the variety in the holes. This course is challenging and requires the ability to drive far. It also demands a great deal of accuracy on the holes with water traps - and there are several. There are also opportunities to open up. The variety of shots exposes the strengths and weaknesses of all players. There are two tees for each hole and two pins that will occasionally relocate. The placement of the tees are very thoughtful and well conceived. The pins are also cleverly placed. The overall design of this course is quite remarkable. It does not favor right or left handed players, and will require forehand and backhand shots from every player. The placement of tees and pins isn't obvious or contrived or intentionally difficult or intentionally obnoxious - every toss on this course is a real pleasure. If you like disc golf, you cannot pass this one up - courses of this caliber are rare.
Cons:
Fortunately for me, I grew up with this course, even though I didn't take my technique seriously until I moved away from Hays for college, many years ago. I played this course yesterday for the first time in over six years. Without my intimate knowledge of the course layout, I surely would have been very frustrated. Frontier Park is really four or five parks grouped together separated by main roads, forested areas, and an impassable creek. The course utilizes this entire area. Hole seven requires a very (relatively) long walk, over a traffic bridge and roadway, along a dyke, and several hundred feet from the last pin - and there is essentially no signage to explain this. It almost seems like you're leaving the park and entering a different part of the town. There are beautiful limestone posts that once had maps for each hole; these have long been neglected. Normally I appreciate walk-aheads on holes to scout out the pin - it's more exercise. But since this course is already so expansive, scouting out holes for first-timers probably becomes tiresome very quick. It is hard not to disagree with those who have already pointed out the lack of signs, despite finding this course so outstanding. My recommendation, like with any course, is that if you have a smartphone like nearly everyone on the planet does, snap a photo of the course map at tee 1. This course is so vast and detailed, with alternative holes and tees, that you will really have to make an effort to study the map, and review details at every single tee. This is fairly standard for anybody who plays new courses often, but Frontier Park is extra special in this sense.
Other Thoughts:
If night golf is your thing, the pins on this course use reflective tape for the number designation. A quick flick of your flashlight easily shows where each pin sits.
As I've already mentioned, this course is quite long, and does one gigantic loop. Be prepared for a long hike, bring lots of water, and I always recommend a short break at holes that have benches.