I've been using a Bosch Bulldog for about 7 years. I got the Makita BHR240 as a mail in rebate from Makita for buying their LXT702 kit from Amazon. It's almost every bit as powerful as the corded Bulldog, and works great for smaller size holes. Combine this tool with a Makita impact driver, and you've got an ideal cordless solution to driving Tapcon fasteners into concrete and masonry. The part of the tool that accepts the battery is mounted on rubber to insulate the battery from vibration, and feels a little bit too loose. The battery still can vibrate against the tool itself. I think Makita could have put a little more work into their battery mount on this tool to better isolate the vibration. Otherwise, i'm very happy with my free tool!