I choose this company because their customer service actually answered my telephone calls or called me back when they said they would. All of the people I have dealt with have been helpful and professional. I received an invoice that was very accurate in a timely manner. I feel safe with this company. They also check my GPS monitor everyday. The first company I choose did not do any of these things and is giving me a hard time about getting a refund even though I didn't open the product and sent it back the next day after receiving it - the company "Mobil Alert" -