I've tried ZC and I'm someone who prefers a deep hollow. I skate o a 3/8" ROH and use the FBV 95/1 (slightly sharper than the 1/2). I tried the ZC 1, which is supposedly the equivalent to a 3/8" ROH. I was extremely impressed, and felt I had increased glide over the ROH, but nothing noticeable over the FBV. I plan on getting an FBV sharpening done again to more closely compare the turning control as well as glide. After reading some of the other posts, I'm curious if maybe it does benefit those who prefer a deeper hollow...who knows, just a thought. I'm currently awaiting my steel to get sent back with the FBV I'm accustomed to, in order for a back to back test! Cheers