Put mine through it's first bit of use today, have to say I'm pretty happy with it so far. I've already cut through the slicker out layer, doing some higher force regrinding scandi ground Mora 1095 blade @ 58-60RC converting to full convex with true distal taper. Also, changed the edge DPS Kershaw Clearwater 7-Step Filet 420J2 @ 52-56 RC in addition to regrindind the hollow primary over to much thinner flat grind.
It does stand up very well to higher pressures in grinding on softer/lower carbide volume steels in order to change blade geometries, most stones will shed abrasive far too readily for any kind of geometry changing of the blade due to high contact pressures combined with soft steel. Seems to work about perfect for this sort of work, which is mostly what I find myself doing with coarse stones.
I am not sure it would be a good idea to use this stone directly on the edge to set the apex however, it is extremely coarse and would put very high PSI on the apex causing chipping/fracture. If using to resharpen extremely quickly, you must leave the edge just shy of apexed and then transfer to a smoother stone (400 or up) to apex with good results.
Honestly this is the stone I have been looking for a while, fits in nicely between my Nubatama 24 & Sigma 120... has a bond strength/friability that is closer to the 24's tenacity without being borderline overkill like the 24. Also, does not seem prone to excessively shedding like the Sigma 120 (for anything but ultra light passes or high carbide volume steels).