Security How Good Are Home Security Alarms In Apartment Buildings ?

How good are home security alarms in apartment buildings ? - security

Alarm system at home is needed in buildings. We have the apartment and are considering installing an alarm system at home. What alarm system do it at home, what are they capable? Is it worth paying $ 30 per month for an alarm system? Brink's is a good name in the alarm industry. Thank you in advance for your suggestions and ideas.