I think people going from the 6+ to the 6 aren't giving the plus a legitimate chance. They automatically think "wow its huge" but if u use it for a few days, you get used to it and the 6 looks like a 4S to you.
I had the Plus for a week. Too big. Didn't fit in my car holder, couldn't use it one handed, which is a deal breaker.
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I'd like to add that the battery was great, even though the 6 is pretty much the same and the screen on the Plus was glorious.