The biggest reason Olde Kinderhook is so tremendous is that it literally turns the modern design paradigm of shot containment on its head.
Rather than concave features that inhibit roll and chance, nearly all the features at OK are convex, and thus require some real planning and execution, as even fairways can shed balls quickly if the shot isn't shaped properly, or lands in the inappropriate parts of the fairway.
Bunkering is sunken mostly well below the elevated greens, and almost is Raynoresque to an extent in look and playability. The greens themselves, while not exhibiting quite the level of variability and sophistication of the rest of the course, still present the player with the Jonesian challenge of placing the ball in the correct "section".
As mentioned, it's also a broad landscape, with big features, lots of variety of holes, some very unexpected shots (including a blind second on a par five), and is wholly enjoyable.