I have had these gps devices for 3 months and they have had issues. I pay to have them installed, then pay to have them removed and installed again when the devices weren't working. Said I would be credited $40 for the inconvenience, even though it cost $125 service fee each time the mechanic had to remove and reinstall the trackers. Had to manually calculate mileage each day for 3 months. They gave a "sorry" to make up for that. Asked if I could get a refund and was told, no it's yours (even though it doesn't work) and all they could do was cancel the service. Oh and each time I had to send back the tracker I had to pay an $80 deposit per tracker! Then wait for them to reimburse me once they verified the gps wasn't damaged by me! Mind you the gps is only $40! Scam artists!