I've never heard of them, have you?
I look at all my usual haunts and none of them had it. With the new knowledge that bases go bad, I'd like to order several so I can keep my ceros in location!
I know of them but have never ordered from them. I do think it's rare that they go, but like all things vape, it's definitely a possibility. Heck - there are folks who could probably fix them, but I'm not one of them (neither interest nor knowledge wise).
Maybe check with Gerry about the site - he seems to be well educated on many of them. He's usually my/our first person to ask.