Pros:
Currently a full 18 holes at the time I played
Lots of different shots needed, left, right straight, etc, although there seemed to be more left to right holes, but it wasn't too prevalent
Elevation - this course will give you a strenuous workout - throughout the layout, you will ascend and descend the mountain twice, along ridges, through valleys, and down steep slopes
Signature holes - as with any ski hill course, the opportunity for epic uphill and downhill shots is abundant, and the designers made it happen. Holes 7 and 17 come to mind especially - hole 7 is probably the best hole on the course, throwing all the way down the snow tubing run, down a 400' + wide, steep slope, with a GORGEOUS view of the Keye's Lake and surrounding hills and forest. Hole 17 plays from the back 9's highest peak, and is a downhill shot which is actually a touch ace run type of shot, very steep with the basket not far from the base of the slope - throw just a LITTLE too hard and you'll overshoot the green easily
The entire course seemed very clean and void of litter, garbage buckets at multiple holes
Heavily wooded, with lots of technical golf shots in all shapes snaking their way through gorgeous tall pines and other marvelous trees
Pin placement - lots of thought seems to have been put in to this - a handfull are on the edge of steep dropoffs that can turn a missed putt for two into a bogey or worse. Others are strategically put on fast rollaway slopes. Hole 12 in my opinion has the coolest location, and also qualifies as a signature hole in my eyes - straight to hyzer (RHBH) shot through spaced out tall trees, with a basket tucked in a sort of cul-de-sac of pines, at the bottom of a 12' hill, with their branches creating a canopy over your head, Hole 16 is BRP/VQ style, dug into a trench.
Signs - most holes have a nice sign with hole shape and length on it
Baskets - they are made locally, but catch perfectly fine. Holes 1-9 are similar to Mach III's, although have shallower cages, whilst 10-18 are more similar to Mach V's, with deeper cages
Multiple tees per hole - tees are wooden framed with some sort of gravel filling, which seemed to grip fine
Cons:
Most shots stay within the mid 100's - mid to upper 200's range of feet. The only shot to really break away from that mold would of course be the downhill bomb on hole 17. Two holes are listed as par fours but in my opinion should be threes as well. It would have been cool to see one or two legit par fours here. Not a big con though.
No water hazards (could be a pro to a lot of people though)
Some of the multiple tees are similar lengths away, and it is sometimes confusing to know which tee to play from when playing from shorts or longs - you may walk to one and find out it is the wrong tee when you get there, and then have to walk up or down hills to the correct one for the layout you're playing
Signage on the back 6 is somewhat lacking.
If you are a stickler for baskets, you may find the locally made ones to be a con. However I feel they more than served their purpose, and if you are blaming them for a significant amount of putts/shots, it may be user error instead.
Other Thoughts:
I was truly pleasantly surprised when I played Keye's. I was expecting a maybe 3 star course, but was blown away with the beauty, design, and fun factor. I drove over two hours to play and thought the drive was 100% worth it. Great elevation and some very unique shots, and picturesque views galore. Some longer par 4's and 5's and maybe a few more open shots would bump this up a half or possibly a full disc rating. BUT I still HIGHLY recommend playing here if you are in the region - I would even call it a destination course.