My wife got a 7 to replace her 6, which was a huge improvement in speed for her. And from the limited time I've played around with it, the camera improvements in low light are noticeable and significant. So if you take a lot of photos, including those in limited light situations, the 7 is the clear winner. That being said, battery life is going to be far better with the 6s+, or 7+ for that matter. I've got a 6s+ and have desire no reason to upgrade at this point. I'll hold out for the 8 or whatever the 10 year anniversary version is, assuming it will be a big jump in specs and looks.