I've had both good and bad luck with DeWalt. They are OK, for light duty use, but seem to wear out fairly quickly on a job. I've also found that there isn't any real consistancy with their tools. Some seem to be worse then others. I still buy them from time to time, but my expectations are always low when I do so. I put them right around Milwakee in quality, reliablity and durability.
The absolute worse product that DeWalt sells are their tips for screw guns. I can't get them to last for more then a few dozen screws. They just strip out and wear away!!! Ritht now I'm using a no name brand called Vulcan that is allot better. I can go most of a day on a tip. Bosch makes good tips too and so did Craftman awhile ago, but not anymore.
My favorites are Makita and Bosch for power tools. I replaced both my 4 1/2 inch grinder and 7 1/4 inch saw that were DeWalt with Makita brands, and the difference is amazing. Smoother, better balance, eaiser to control and just a better fit overall.
Eddie