Taking a cue from the swooping spots of color found on the front panel, RCA set the navigation controls tilted slightly to the left. It's a neat visual trick, but from a practical perspective, it makes navigation a bit trickier.
One of the Opal's navigation quirks we aren't thrilled about is the Menu button (the button marked "M," found above the direction control). In most cases, pressing it twice would take you back to the Opal's main menu. Under some circumstances, however, pressing the Menu button twice would only take you back to a submenu, requiring you to use the arrow buttons to back out to the main menu. We would have liked a press-and-hold method for ensuring the main menu can always be accessed in a pinch.
At under $80, the Opal makes for an adequate iPod Nano stunt double for those times when you just don't want to risk putting a pricey gadget in harm's way. Support for Audible audio books and subscription music content make the Opal a suitable player to take to the gym. We still wish it had a radio, however.