My unit behaves much better with the latest firmware. I had one longer pause right after the firmware upgrade, but nothing really out of place since. I saw a post by Cayin Support at one point that noted that the unit really is most reliable when doing one thing at a time. I would say from experience that this is correct. For example, I tend to jam up the works when I try to change songs while it is still playing another song. If I hit stop first, everything seems to go more smoothly.