Pros:
NAD Park is a prime example of what Northwest disc golf is all about. You're playing through an old growth forest with very little underbrush. It's pretty quiet and serene, even though it sits right next to the major highway of the area. With cement tee pads, challenging lines, quality baskets, and multiple tees and pin placements, this course offers something for nearly everyone. The reds offer birdie opportunities and ace runs for the more experienced players, and aren't too frustrating for newer players. Once you reach the point where you're bored with the reds, the blues bring in a whole new challenge. I haven't played them myself yet, so I can't speak to how they differ from the reds, but they offer longer approaches at the very least. I've never seen this course crowded either, which is nice when you play solo or with small groups.
The layout is very well thought out and uses the land available to challenge any type of throw. You have a little bit of everything to challenge your game, from tight fairways to uphill shots, downhill left turning fairways to flat right turning ones, and everything in between. There aren't any long walkouts, and the fairways don't really encroach on each other. There are random mandos on the course that you would REALLY have to shank a drive to miss, but most of these are well thought out as well. All mandos are clearly marked, and there are plenty of "next tee" signs and bag hangers scattered throughout the course.
Finally, this course is extremely accessible, as it is less than 100 yards east of the Austin Dr exit.
Cons:
The length and tightness of the fairways could be a con to some. This type of course fits my game and my arm just fine, but I could see people getting bored if they want the chance to really air one out. A lot of these are mid and putter holes for the higher level of golfer. That's not me though, so I don't consider this a con. If you do? That's why I included this in "cons".
The course can be a bit confusing for a first time visitor, as a lot of the signage on the teepads is missing. The navigation is fine, but it would be nice to know exactly where you're supposed to be throwing to without necessarily having to walk the hole ahead of time.
Other Thoughts:
A course like this that has multiple pin placements in blind locations is awesome. However, it would be nice if they could find some way to let you know which placement the pin is in. As in, put a marker at the teepad that states which one you're throwing to, and change that whenever the placement changes. That way you could have signage on the pad that shows both possibilities, but then lets you know which one is the reality. I guess they'd have to actually replace the missing signs before doing this though.
NAD is one of my favorite courses that I've played. It fits my range well and I can score low, but it's still challenging enough to keep me coming back for more. It holds the distinction of being my lowest score through 18 in the state (my -7 in Indiana will be tough to beat with my skill set), and will likely be the first 18 that I score below par on. Once that happens, and once that becomes a regular thing, I'll just switch to blues and keep on doing it. That's why NAD is so fun. It's challenging enough for any level of player.