I don't use that much data, my 2GB plan works fine for me at only $75 for 2 lines per month with Verizon (I usually use about 2GB per month).
That's $55 less per month than the unlimited plan (@ $130 per month for 2 lines).
Why would I go with unlimited????

I'm starting to see why/how these companies are making so much money on people that don't use WiFi, that is available most everywhere. People are just to lazy to login into WiFi and can't be bothered with it.
I just fixed a customer's crappy WiFi last month, in their home. Was there today and noticed the log showed very little use of the WiFi over this last month. All of them had their WiFi turned off on their phones and still using hotspots for their tablets *facepalm*