Jim,
Although they're a good set, I was less intrigued and enthalled with the par threes overall as 3 of the 4 play to within a club or so distance-wise. I do have to admit that I loved 4.
In my mind, the course really shines in the variety and interest of the par fours which run the gamut. Similar to Lancaster and Aronimink, it offers one solid par four after another, but with much more charm than the latter provides.
And, the two par fives are both world-class, putting it in my mind in a group with Merion and Pine Valley and St. Andrews as courses having only 2 par fives with both of them being great holes.