Honestly, I moved off of unlimited a while ago for the ability to tether. This year, my wife and I finally dropped off our respective family plans to create our own. We are on the 10GB share (AT&T bumped it up to 20GB) with unlimited talk and text for $130/month (would normally be $100 + $30 per line but you get a $15 discount on Next). My 6+ costs us about $51/month and her 6 costs $31/month. My iPad adds another $10/month though that will go away next month as I simply tether via continuity to my 6+.
I'm a big fan of Next because it gives me the freedom and ability to pay off my device if I so choose, or upgrade within a year, year and a half or two years.
My wife doesn't use hardly any data and I rarely use more than 5GB (my work phone is still on unlimited). Works out really well for us - especially since I tend to upgrade annually anyways.
