We use the Blackstone FBV as an option at our pro shop. Being I've always used traditional ROH either 1/2 or 7/16, the only thing close I liked in the FBV was 100/75. Nothing felt like it had the same bite, but it definitely felt good when skating, especially tight turns. It felt the sharpening did not last as long as ROH, and just didnt seem worth the switch. I also didnt like the feeling of when youre standing waiting for a faceoff, it feels like you have no edge at times. It definitely takes wayyyy less time to sharpen any FBV, which is nice as someone that sharpens hundreds of pairs a year, haha.