There's a few different sharpeners with the Chef's Choice brand. AFAIK, all have the tri-beveled edge feature, some will not sharpen all the way back to the bolster.
I do have a Chef's Choice sharpener somewhere around here. I refuse to use it, or recommend it. I really dislike the tri-beveled edge, it just never seems to really be sharp. Once you put a tri-bevel on a knife, you're going to lose some of the edge (to my way of thinking, at least several years of home wear & tear,) and that's just the final nail in the coffin.
@LMichaels I'd agree, I don't get why Chef's Choice sharpeners are so highly recommended. Drop the tri-bevel, and just form a good edge. I think the basic mechanical design in each slot is reasonably sound, especially for the models that will sharpen all the way to the bolster, and the stones are generally good, maybe a bit on the coarse side for me. But, as they're currently made, I won't use them and won't recommend them. Shoot, I've sold a few WorkSharp kits myself. My brother even uses one to keep his orchard pruners sharp (he's pruning something like 100 acres of cherries.)