I bought a 12V DeWalt in 1996 and used it installing telecom switching equipment for about four years all over the country. Since I got it, I also used it to build half of a 30'X 20' deck all with 2.5" lag screws and to build shelves along a whole wall of the garages in the last two houses I've owned, in addition to many other smaller household projects.
I've dropped it, broken bits drilling through computer floor tiles with it, set small anchors in concrete that I've drilled with masonry bits with it, ran the batteries down countless times and charged them back up again and it works like it's new.
In other words, when the time comes for me to buy another cordless drill/driver, I'm buying DeWalt again.