I purchased my CrOx from SRD quite awhile ago and it sits in a drawer, I played around with it quite awhile and it can easily kick up the keenness of an edge but I found out it can also make an edge toothy or harsh by doing to many passes.
My best success was doing my normal progression 4, 8, 12k then JNAT then would do 10-15 light passes on paste but I have not used paste in quite awhile as my edges are acceptable enough coming off the stones