Thought I'd resurrect this thread and add myself to the list. Yesterday was day 12 of using the iPhone 7+ and I'll be shipping it off tonight.
There's nothing wrong with my 7+. Yes, it click/creaks and yes I can hear the buzzing on the back, but those aren't an issue for me really. The 7+ just isn't that much better than the 6s+.
Yes, it's water resistant, but after watching some tear down videos of how it's water protected, I haven't changed my behavior. I still wouldn't go swimming with it and I've changed my mind about showering with it.
Yes, it has a better camera and telephoto lense, but I really haven't used it for anything other than testing it out.
Yes, it's got great battery life, but my 6s+ is right there with it.
Yes, it's fast. But the the 6s+ is faster than pretty much everything except the 7+
In summary, It's just not worth going from the 6s+ To the 7+ IMO. That's not a knock against the 7, that's a testament to how outstanding the 6s+ is.