We had done many research with various alarm companies such as Alarm Force, ADT, Brinks, Counter Force, etc, however in the end we had chosen ADT.
Why? Well their rep had come to our home informing of the various packages we can choose from along with "no catch" promotions. The price was right too.
Installation was done efficiently and the technician who installed the Alarm System + keypads explained each function of the keypad and how to troubleshoot.
Even the telephone agents are helpful for any small question and are very friendly over the phone.
Will definitely recommend.