I had the Pod Go for 4 days and it just kept freezing or the sound would stop. Sadly I sent it back for a refund and I'll wait to see if the issues are fixed.
If it is firmware it should be fixable but then it should have shown up in testing, I fear it's a hardware fault that has crept in during manufacturer. I have a couple of Pod XT live, a Pod XT, Pod HD, a Pod HD400, Pod XT Pro and a TT and they have all been fine, although an M5 I had kept locking up too.
Fingers crossed the issues are fixed.
Keith M