This is a must-have item for anyone who does stock work. It cut my install time for recoil pads in half. The only real problem I have with it is the ease of over-compressing the pad you're grinding, thus causing a concave in the pad when finished. A little care and caution goes a long way here.
Pros: Easy to use, easy to set angle of grind
Cons: If you're not careful, you can overcompress the pad you're grinding on, and make it concave.
This review was written in the old system and had content requirements that are different than reviews written today.