Review on Lansky LDPST Double Sided Diamon by Loren Schmidt

The abrasive coating was completely worn away in less than a dozen sharpenings. I don't claim to be a master grinder, but this "stone" decayed immediately. However, this stone wears away material very quickly. This seems to be most useful when you have a surprisingly dull knife that requires a lot of work. Then use other, much less aggressive stones.