Gearlive has an in-depth review of the Rio Carbon. They seem pretty happy with it, and by reading the review I’ve finally discovered how one is meant to navigate menus on the Carbon. It has a scroll-wheel on one of the top corners that doubles as a selection button (by clicking inwards on the wheel).
This is a solid number from Rio that they can be proud of. Both the desktop software and the Carbon menu systems are so intuitive that you won?t bother reading the manual. You get rich, clear and long lasting sound, in such a small package it?s really a marvel of technology. For those of you with a decent (but not enormous, as in, hundreds of CD?s) collection of songs this player is a great little product.