The main problem is the failure mode (complete). Either you get a bad one or, like most, you don't... but if it breaks, it's completely gone. I'd like to know

The main problem is the failure mode (complete). Either you get a bad one or, like most, you don't... but if it breaks, it's completely gone. I'd like to know how many have experienced a failure after 90 days or whatever the cut-off is so that I can stop worrying so much beyond a certain point.