I just did the upgrade today; I wound up combining a couple of USB printer cords so I could use my main computer without moving anything around (besides untangling the printer cords). I didn't have any problems except trying to move the small SVC switch back and forth. I didn't have the right screwdriver and my hands are a tad large and clumsy. I did finally get it though. Everything worked as advertised. I didn't use the PLII music mode enough before the firmware to compare, but it sounds good now. Are there any advantages to using the USB connection over an optical cable (my motherboard has an optical connection)? I can't think of any.