I updated mine shortly after it came out without a hitch. Actually you don't have to have a clean (empty) memory stick as long as thats the ONLY ISO file on the top level folder. I have a crap load of flash drives and they all have something on them so I didn't want to go buy a new one and I didn't want to delete one I already have. That being said, the only issue I have had is the boot-up time on the unit. It is extremely slow to boot up and when I push the right toggle to ACCEPT, it takes several seconds to acknowledge. Other than that, I don't know what folks are complaining about...I like my Boom Box!.....the GPS is pretty awesome, though a bit cumbersome sometimes but most are, except the iPhone Google maps....