We use Telematics on our equipment at work. But it's more of a location feature that we use to keep track of the equipment. Techs and delivery drivers got an app on our phones to locate the piece of equipment. Or I can log in to our service software, and link to the locating software. Ping the GPS and it will pop the location up on Google maps. It's handy if the person who calls in the service call or pick up on a piece of equipment, but can't tell you where it is.
Not sure how much it costs. But all of our equipment over a certain value has it installed.
That being said, a GPS unit can be disabled in under 10 seconds.