I read 2 forum where people had problem with the hotspot. I think Verizon locks that feature so that you pay extra 20 bucks every month to use it.
Whenever they tried to activate it, it'd pop up a msg like "please contact verizon"
I just want to make sure that it works before I purchase the device
If you are a Verizon customer with a legacy Nationwide plan with an Android on your line, then that happens. And it is an extra $30/mo. But you can use PDANet/FoxFi on most Androids and WiFi tether for free. The only exception to that is Motorola phones - you need root to WiFi tether for free. Although even on Motorola phones w/o root you can USB and bluetooth tether for free using PDANet/FoxFi.
With an iP6/6+, there simply is no hotspot feature to turn on in the Settings menu if you have a Nationwide plan unless you log online and add the hotspot feature to your line for an extra $30/mo. If you jailbreak the phone and pay $3 for an app, the hotspot feature appears in the Settings menu w/o having to add the hotspot feature online and you can use the hotspot feature for free.
If you are on a More Everything plan, the hotspot feature is included at no extra charge.
So on Verizon, as others have pointed out, it depends on your plan. However even with the Nationwide plans as long as you can jailbreak, root or use PDANet/FoxFi, you can WiFi tether for free on Verizon.