Pros: Durability, Ease of Use, None
Too coarse to use on knives.
I purchased this to carry with me for quick touch ups during the day, and after testing it on a cheap piece of knife, I put it on a shelf and forgot about it. It might be okay for serrated edges, but not for a plain edge. It is too coarse. There are similiar products (ceramic) that cost the same and do a better job.