we have a good alarm and false alarms are very rare. I get that funny feeling when it goes off. my wife and I share a safe word too in case one of us is up while the other comes downstairs in the middle of the night or something. We have many windows, all doors and their is a motion detector too. at bedtime it is on 'instant' so there is no delay before the alarm goes off(if I open the door from work I will have a brief period of time to eneter the code after breaching the alarm.
I would stay upstairs with the family, and the alarm people will call. They can tell me immediately what has been breached: they can say basement window, motion detector inside, garage door, etc. Basically, I would know immediately if this was for real or not. That's when I tell them to send police.
"Damn the torpedoes, full speed ahead!" -Admiral Farragut @ Battle of Mobile Bay 05AUG1864