Wow. Very impressed after first use. I also have a Milwaukee 2704 brushless hammer drill and it's like night and day. Hanging from a rope and drilling into hard limestone, it took me over 5 minutes with frequent stops to drill a 1/2" x 6" hole with the 2704. Using the 2712 ROTARY Hammer, the same hole took less than a minute. (same limestone, same hanging from a rope, each with new drill bits). And after seven holes, 2704 was made with a 3.0 amp battery. The same battery made over 20 holes with