I have yet to visit Sand Hills so I can't comment on it. But, I absolutely love the Kingsley Club. It presents such a unique type of golf for the US. Many courses claim to utilize the "ground game" but Kingsley really comes through with it. Many of the holes there require you to bounce the ball in or use angles to get close to the hole.
An excellent example of the uniqueness of Kingsley is the approach shot to #3. A fellow GCA'er, Dan Taylor, had hit a good tee shot and was left with a mid-iron to the green. The pin was on the right side of the green. Dan hit his approach shot to short of the left side of the green. It proceeded to bounch onto the green, catch the ridge and work it's way around the bunker fronting the middle of the green and trickled down to the pin on the right of the green. It ended up about 5 feet away and was just a "fun" shot to witness. It's just the type of golf you don't see much in the States.
The front nine has been well documented and is wonderful. I think the back is great as well. It definitely has a few more just "good" holes as opposed to excellent or world class. But, it still possesses many unique golf holes. A few of my favorites on the back nine:
#11, I think this is an excellent par 3, especially with a back right pin position. It may not be as visually dramatic as the others but is a great hole.
#12, beautiful tee shot to the valley below, the hillside on the right is definitely in play and not a place to miss.
#13, one of my favorite short par 4's in golf. Just a wonderful hole with options galore.
#14, From the back tee, a difficult tee shot if you choose to carry it over the bunkers on the right. If you succeed, the hole is reachable in two. The green has many subtle breaks in it though that aren't seen at first.
#15, An excellent tough par 4. A solid tee shot is required to be able to reach or stop the ball on the crowned green.
#16, very good Redan built into the side of the hill. It's a very natural looking Redan and extremely fun to watch a ball that lands 20 yards right of the green feed down to the hole.