I have a B&D Mouse, I like it fine for less-than-two-hours-at-a-time work. Beyond that the vibration sets up pain in my elbows, meaning I've never run it hard enough to melt any of it's bits. I've used it mostly on wood, but some metal. Refurbished three chairs and one girls desk with it.
That and my Craftsman jigsaw are the only ones of their brands I own. Outside of that, every other single power tool collectively owned by this household is Dewalt. Been very happy with the quality of all of them.