Had a 6, now have an 8 and DW has a 7+ and all work fine on iOS 11.1. No issues texting with our son who has Samsung Galaxy (G8 or whatever the new one is).
Don't really like Apple as a corporation, but their products work well. Got tired of my laptop crashing and freezing su dumped Windows and went with MacOS. Now my Macbook, DW's Macbook and our phones all just work together with no drama and no need for constant reboots. Tablet in MH is still Android, but thinking about iPad.
Don't like being locked into a proprietary system, but like even less when my equipment doesn't work. Ran Linux for a while but DW had problems learning the new system. She had no issues withe the Apple stuff.