I've found one exception: the software on Panasonic Toughbooks was good when I used it. Well, it wasn't buggy, didn't seem bloated, didn't have a confusing UI, and didn't crash. It was not the greatest in UI design in every way (it was a bit clunky in a Win32 sense), but it was the first time I thought that the OEM software on a laptop was being friendly to me.