I have used it in the past, mainly to track our roll-off trucks and saw cutting trucks, that way there were no arguments on how long a worker was at the job or the contractor stating they were late, I have the proof.

I find it a very helpful tool. We first had one install on a saw truck, without the operators knowledge, well by having it installed, we found out that he was working on the side during the weekends using our equipment.

It was put in our policy, that all company vehicles are installed with GPS systems.