Pros: Easy to cut Chevy steel roof, for NMO mounting - no chipping paint on edge of hole, blades are very good for this .- very little burr on the bottom, minimal coolant requirement also Cons: - the actual hole drilled was a little larger than 3/4" because the drill bit wandered around a bit while drilling the hole. I can't describe exactly how it worked , but I did feel the drill bit circling a little off true center when the hole was first cut, so the hole was a little over 3/4" and the NMO mount's "ears" were really cocking to grip the metal given the larger hole I think this is more of an issue with the NMO mount design than the Bosch drill but still when that drill makes a perfect .750d hole hmmm, I would definitely prefer that. Start the drill 1/3 turn. high speed is not required, but not too low.