Without a doubt I will be keeping mine. It's a winner!! I did think even before receiving the iPhone 6 + that I would probably return it for the iPhone 6, I just wanted to get the iPhone 6+ first to see if it was too big. One minute into playing with the iPhone 6+ I knew I wouldn't and couldn't go smaller.
Keeping for sure. NOT keeping iPad Mini. And since I don't perceive any lag, there is none on mine.
I'd hope so. If a new phone that has a years worth of newer tech isn't better than your old iPhone, something is seriously wrong with Apple.Me!! Love it. Best iPhone I've ever owned!!! My hubby laughs because he says I say this after every new iphone, but it is THE best iPhone I've owned!!