I was in a position to use one when I was helping a friend with an LS build. I didn't get a warm and fuzzy using it at all. It felt and looked light. In fact, I told him I didn't trust it and ran home to get my own mechanical torque wrench. The digital was reading about 5-7 lbs light across the board. Maybe it got dropped or knocked around to take it out of calibration. Or, maybe it was just off that much. I wonder if the fact there are two separate "drives" in operation that there is a falsely high reading because of the added friction.