And, relatively, brain dead .. although they are a useful way of playing Audible books (as long as the book sections are not too long!). For music they sound OK, but the firmware is horrible .. slow, stupid, limited in number of items it can handle etc. Yep, even slower than the original zip, if you load a lot of music track and then unplug it .. 'listen tomorrow'.
I think Sansa must have designed down to a price .. £25 or something. Gotta love the portability and battery life though.