The best part of being grandfathered onto the unlimited data plan with Verizon is unlimited tethering!
I pay $29.99 for Unlimited Email & Web, and $30.00 for "4G Smartphone Hotspot" - which is also unlimited. So I get unlimited LTE tethering, which is great - I work from home so I use this to go work from the park, etc.. for a change of scenery. Use about 20GB of data per month that way.
Downside was paying full price for an iPhone 5s.. I am thinking about buying iPhone 6 - with VoLTE I could be on the phone and tether at the same time! That was only thing keeping me from using LTE full time and getting rid of my cable modem connection.