We chose to have E Z Alarm to install our car alarm because they are very affordable and offer more product for the money than other car alarm businesses- and they are even cheaper! Granted, they are a small business and their place looks run-down. But their product is good and to this day we have never had any issues with our alarm. In fact, everyone likes the uniqueness of it because it has a blue LED light that flashes a certain number of times to alert you of any particular instances where someone bumped the car, touched it, tried to break in, etc. They even have a new product that alerts you immediately if someone sets off the alarm, but this requires you to be withing about a 2 mile radius.