For example, the response time for playing a random track depends on where it lives on the hard drive. For impatient operators like us, this can sometimes be a drag, albeit minor. Don't expect to be instantly gratified as you move from track to track. Also, when moving from the Library to the EAX display, a momentary splash screen appears, telling the user to press a certain button to return to another menu. Fortunately, this function can be turned off.
Durability is a huge factor when dealing with a portable hard drive.
Unlike flash memory-based players, there are indeed moving parts involved. When we reviewed the PJB-100, it was easy to see its susceptibility to a nasty spill. So far, the Jukebox seems to stand up to our damage tests. But don't tempt fate. Don't drop the Jukebox.