I had the 6 Plus and 6s Plus. Since I'm on the upgrade plan and get the new phone every year, I figured last year I'd go for the 7 to change things up, reduce my monthly payments a bit, make the phone easier to hold in the hand and fit in the pocket.
Well, after a year with the 7, I hate it. The lower PPI screen is noticeable to my eyes. Web browsing is worse because there's less of a page on the screen, and clicking on small links is tougher. The battery life is a joke for a phone in 2017. I cannot wait to get an 8 Plus later this month.
YMMV of course.