The iPhone 5 black paint chipping problem, the iPhone 5 sleep/wake button failure, the iPhone 5 battery problem. The bending issue extends to the regular 6 as well, I've encountered multiple devices in the wild that have it. That's about it though.
I would also argue that all of these issues are more isolated than reports make it seem. No doubt, they are all grounds for a good extended warranty program at the very least but they aren't dangerous, recall-worthy or a case where all devices are affected. Just a significant enough number that if it occurs, it should be a free repair or replacement.
Don't know how I missed that one, maybe because it's not as serious, but I'd say it still counts.
I like my iPhone too, but I am curious what other problems are out there. Seems like they've been pretty solid for the most part, but I say that out of potential cluelessness, not defensiveness.
I would also argue that all of these issues are more isolated than reports make it seem. No doubt, they are all grounds for a good extended warranty program at the very least but they aren't dangerous, recall-worthy or a case where all devices are affected. Just a significant enough number that if it occurs, it should be a free repair or replacement.
For a quick glance at all the recent acknowledged design flaws Apple has copped to, this page is a useful resource: https://www.apple.com/ca/support/exchange_repair/