I selected Brinks for my alarm system after having two other companies visit my home.
The salesman was great and even had a test keypad for me to try out. He was also very honest about the components I needed to install and the ones I didn't need, plus at the time, Brinks had a special package with a fancy alarm pad so I went for it.
The installer wasn't that great and didn't really think like a homeowner - he wanted to put my alarm behind the most inconvenient place behind my front door and I had to help him with placement of my motion detectors.
I do feel very confident in the monitoring system and the keypad that was installed is ridiculously easy to operate.