I have one of the Older Blue Battery Pack Muvo's without the LCD screen (128mb model)
I paid 160 for it including shipping two years ago @ jandr.com
I bought it after many reviews, after debating with irivers, nomads, yepps, and the like.
Basically if you want a no frills, simple, small (and trust me it is SMALL with excellent battery life on 1 AAA battery) go for the muvo.
It's an excellent player which you plug in to ur computer directly (via USB) and drag and drop songs onto it. Its that simple. (USB 1.1)
As an added bonus, you can use it as a portable drive, uploading ur documents or whatever needs be on these drives. How's that for slickness.
If you're the picky consumer that requires an LCD and many other functions like shuffle, crossfade, and a 10gb space (I still dont' see why) Stay away from the muvo.