I mostly used the 180 stone, but it has plenty of life left in it. I think I sharpened 9 knives with it. The 320 was used a few times and I never used the 600. Comes in the original case although I do not have the squirt bottle and instructions, but it is pretty obvious and easy to use. Nothing wrong with this piece, I just upgraded to a belt sander to expedite the process. Asking $80 shipped conus. Thanks for looking.