I have one with the laminated ZDP-189 blade.
The edge feels "interesting". I'm not sure how to explain it, and I haven't done enough cutting with it to translate that into anything functional. I have another ZDP-189 blade, a Hattori santoku, and it is a great knife except for a surprising susceptability to corrosion (offset by a surprisingly easy to sharpen edge).
Personally I prefer the shape of the T-12 Spearpoint or T-7 Westcliff blades over the Quest's clip, but that is for aesthetic reasons.
Overall it has the usual outstanding William Henry quality.