I had my Gen 1 replaced as have a few others here. I don't think it is "cell failure was something like 2 problems per million" based on just the numbers on this forum let alone those that are not on the forum.
My repair took like 2.5 weeks as they needed to get the battery section and some equipment to install/test it. So far so good with it. Have < 1 year let on the 7 yr and 100K voltec warranty.