I've done it a couple of times. You should try this. It does not matter if you're writing total crap. The sheer act of completing the challenge will improve your writing -- heck, getting close will improve your writing. It's something everybody ought to do.
.....also I have no idea what I'm writing, or how far I'll get, but I'm going for it again.
.....also I have no idea what I'm writing, or how far I'll get, but I'm going for it again.