Sat through the demo twice (partially to get an extra demo disc). While very impressive for an uncalibrated headphone processing technology, it wasn't up there with the Smyth Realiser demos I've heard. The directionality to the sides was more stable and precise than localization in front or behind, which was a bit swimmy by comparison.
Of course, they don't have the advantages of the Realiser's individual HTRF measurements nor their head tracker (during the DTS demo, I turned to tell a friend that I liked what I was hearing, unfortunately the entire soundstage turned with me and killed the illusion). Doubt they can do anything about the head tracker (will be up to manufacturers that license Headphone-X), but I hope they offer a few different HTRF curves that users can switch between in order to find one that works best for them (like my old Senheiser headphone processor did).