The base cost per device varies with the most expensive being $40 for smartphones and the cheapest being $10 for tablets. In addition to the base cost per device, the plan requires the unlimited talk, unlimited text, and shared data pool to be purchased at $50 for 1GB, $60 for 2GB, and $10 per 2GB at each level thereafter up to 10GB. Overages will cost a hefty $15 per 1GB. With Verizon's still ridiculously high prices, one upside is that tethering is now included in the cost.
For those of you grandfathered into unlimited data plans, you can keep your plan as long as you do not purchase any more subsidized phones.