I have a 7+ and I think it's a piece of crap. I'll be getting the next one in hopes that the quality will have improved. I don't drop my phones and I'm not hard on them, but I am on my fourth iPhone 7+. The first had a stuck volume button out of the box. On the second, the camera stopped working after a month. The third couldn't keep a connection to a cellular network. I've had the fourth for about a month now.
If I were you, I'd wait if you can (you're probably looking at getting your hands on a new phone in October if you wait), or just get a 6S+. Gotta hand it to Apple though, their customer service and support for their product has been great.
Edit to say that I'll be scaling back to the non-plus size on my next phone. It's not unwieldy, but I have found myself wishing it were smaller at times.