Should we get a home security system for Mom?

My sister Karen  has been talking to me lately about how she thinks we should get a home alarm system for our mother.  Apparently Mom has been calling Karen at all hours of the night several times in the past couple of weeks because she has been frightened by a strange noise, or thinks that someone is trying to break into her house.  I have to agree that in those circumstance, buying a home alarm system is probably a very good idea.  Although I feel that Mom lives in a very safe neighborhood, giving her the peace of mind that she needs so that she stops calling Karen all the time is a good idea.