If you're struggling with an iPhone or iPad that isn't working right, restoring it as new can be just what the device ordered!
I've had a third-generation iPad — the first Retina Display-equipped model — since it was released. I've never upgraded, not even to the new iPad Air or iPad Air 2 because the iPad 3 has always done what I wanted it to do.
Or at least it used to. When I first updated to iOS 8, it killed my iPad. Made it a doorstop. The iPad became sluggish and unresponsive. It became almost impossible to type on it; launching apps became excruciatingly slow, and I'd occasionally get spontaneous restarts too. I was afraid it wasn't going to be useful anymore. I've recently resurrected it and done a clean install with iOS 8, and I'm quite happy with the results.