Tried the 10, 15 and 20, boy are they good. First wheated bourbon's I've tried and it seems to me they taste slightly 'rounder', or softer for lack of a better term.
My favorite was the 10 believe it or not, but I loved the aroma of the 20 out of the 3.
It was neat to finally try them, but I don't feel bad I cannot find, nor afford them.