Well... I preordered the 7 Plus 128GB in Matte Black as soon as it became live. Was told September 16th delivery. That day came and went and when I called, they said "Oh its Oct 3rd now". Then yesterday got a message saying "Oh its Oct 17th now". Totally fed up I went to the local O2 store and had a hold of a 7 Plus and you know what? It is just not worth the upgrade from a 6s Plus. The dual camera isn't that much of a benefit if you're serious about photography. I don't plan on swimming with my phone and the button is kind of..meh.
I got the 6s Plus 128gb for less a month , with 6 times the amount of data allowance and for half the upfront cost. Oh and in 12 months I can upgrade with no penalty for the iPhone 7s/8 next year.
I think the sheer hype of the phone is silly as its really not that great in my opinion.
Matt
I went with a 6S Plus a couple weeks before the Apple event.
My reasons? I bought the 6 Plus on preorder day at 3am, all I could get without a long wait was a 16GB model. That phone's lack of storage drove me nuts, seriously it was a daily irritation!
I walked into the store, got $305 for that phone, threw down a couple hundred more & walked out with a 64GB 6S Plus in rose gold. I love my new phone, it feels snappier than my old 6 Plus, the screen is lush & no waiting!
I paid off enough of the phone that I can upgrade to a 7 Plus when more become available or just wait for iPhone 8.
Enjoy your new phone