Value is relative. If you plan on sharpening a lot of knives, and only want to buy once, buy diamond stones. If you will sharpen a lot of knives on the Razor edge systems stones, you might wear a few out in a lifetime. For occasional use, 1 stone might last a lifetime. I've bought some Razor Edge gear, my take...the cub guide is great and big enough for most pocket, hunting, paring and small kitchen knives. Don't spend the money on the big guide unless you have really big wide "Bowie" or kitchen knives to sharpen. I was not too impressed with the stones, "fine" was still pretty coarse as a finishing stone IMO, and probably coarse enough for anything short of re-profiling. It wore away fairly fast too. The coarse stone was...very aggressive. Just my opinion, YMMV, but the best things to spend your money on from Razor Edge are the cub guide, the steels, and the edge testers