This is the first time I've used a conditioning belt. Pretty straightforward and easy to get accustomed to. I accidentally ordered a medium and meant to order a fine therefore I can't give a completely accurate review for what I was trying to accomplish. I've been working with some pretty hard Steel D2 and T1. The medium grade conditioning belt leaves brush marks but does a fine job of cleaning and smoothing. The one thing I enjoy the most of this conditioning belt is when doing smoothing or flat grinds it cleans the birds off of the edge with a very slight rocking of the workpiece without rounding or damaging any distinctive lines. Of course exaggeration of the angle and or excessive pressure will damage your lines. With all of this in mind I think of a conditioning belt as a specialty tool for specific jobs. As far as the belt itself it is quite obvious it is made of quality material and will last a long time.