I dunno, I guess it depends on your point of view. This is what my old 24 month contract with unlimited data and a 32gb 5s cost me for 24 months.
$ 300 - Down payment for 32gb iPhone 5s
$1800 - $75 unlimited data, voice and text plans for 24 months
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$2100 - total cost for phone and service for 24 months
I upgraded to a 128gb 6s+ with Next and 2gb mobileshare, and this is what it will cost over the next 24 months.
$ 0 - No down payment for phone
$1320 - $55 2gb Mobile Share plan for 24 months
$ 768 - $32 installment payment for 128gb iPhone 6s Plus for 24 months
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$2088 - total cost for phone and service for 24 months
The $5 increase in unlimited data would add another $120 over the course of 24 months if I kept the old plan. I can see why some people want to keep unlimited data, but I just wasn't using it and this seemed like a much better deal. I upgraded to a 128gb 6s+ and it's going to cost basically the same as I paid for a 32gb 5s over the past two years.
Good comparison and number breakdown. Some people and also AT&T reps themselves only put out the monthly carrier service portion without including any next payments or the customer having to pay for their own device in full.
Even if you were not using much data before the savings over 2 years are minimal IMO and having the peace of mind you will never get any overages is also a plus.
On single lines like yours its a close comparison, when you get into family plans with 3-4 lines and when those lines only cost $9.99 on old nonshare plans and all of them get full subsidized devices is where the big difference in money comes in.
Even though AT&T reps will do everything in their power to make you switch away from old 2 year contract plans to mobile share and next payments plans and cook up the numbers to make it look like you'll be saving.