Summary: I just drilled over 400 pocket holes in 3/4 MDF and the drill was still going when I finished, although it was slowing noticeably. This was took a few hours and the drill performed perfectly, barring one small problem. The keyless chuck is great, but you will need to tighten the chuck every once in a while, as it did get loose every 25 - 40 holes.
Summary: I'm a moderate do it yourselfer. Bought this product when my Nicad sears drill died. I own lawn equipment from Hitachi so I thought I would give this product a try. Glad I did. This drill is outstanding! Great torque. Durable. Battery lasts a long time (much longer than the Nicad sears model). I used it to build deck and only had to recharge it 1 time. I'm not sure about overall longevity of product but if it's anything like my weedeater, should be great! Recommended.
Summary: i had 2 black and decker 21 volt drills and burned them out in no time this drill was more expensive but the battery life is great and so is the over all power if i ever need a new drill i will buy this one over and over again