No personal experience, but a google search brought me to the sport's main page and its descriptions. I would offer the following observations.
One of the "dimensions" of practical shooting games is how prescribed things are. Some games often or always dictate order of target engagement (IDPA), others rarely do so or do so only as to a single element of the stage (USPSA, and to a lesser extent, Steel Challenge). The numbered plates here, and the gigantic penalties for engaging out of order, put this one far at the dictated end of the spectrum (as opposed to the freestyle side).
Another "dimension" is how fixed the courses of fire are. Steel Challenge, by virtue of being basically the same courses of fire for every match, is just about as fixed as skeet. USPSA and IDPA are, outside of classifiers, at the other end of the spectrum on that dimension. This one appears to be in between - the sequences change, but the lanes are of fairly consistent (and narrow) dimensions and the distances are only variable among a few discrete distances.
So if you like rimfire steel challenge, but wish the targets were closer together, want to be told what order to shoot them with, and have slightly different stages every match, this may be your game. As a practical matter, it looks like it would take up a lot less range space than most other practical shooting games, with an entire match fitting into a single bay. I have no doubt it's fun.
