The J and M digital player shown is an improved unit over the old. Had one on a 2003 ABS bike that accepted a thumb drive or a SD card. It used to lock up when I switched from CD to the Radio and have to disconnect the battery. This one I installed on a 2005 GL 1800. No problems and crystal clear. This unit only accepts the thumb drive. It does not lock up like the old one.
However, keep in mind the complexity of a thumb drive is slower to react than an SD card. So always give the unit time to react when you punch the CD control buttons when switching tracks, channels, or over to radio and back. The low price makes it worth it compared to a Honda CD Player. My 2005 is a 1st generation bike so it only holds about 99 songs on each of the 5 channels. Plenty for me to listen to (500 songs).