eh my dad bough security from this weird place, but if u want pros and cons here they are:
Cameras:
+Capture and record
+Good for evidence in a court of law
+Can fit almost anywhere depending on the model
-Easy to break depending on the model
-Most don't work in the dark (big point)
-Suck if recorded to a comp/+AV recording for TV works better
full on Security System:
+Alarm, camera, and Electric fence (pick any or all)
+Again, good for court of law
+Sensor triggers alarms with movement (not slightest)
+If u put electric fence, stupid **** burglars will probably get a a 10,000 volt shock
-Price tag comes in high
-Not the good when your dealing with professional burglars. lol duhh :P
-If not left on, it would be rather hard (if the service is shittt3h!) to incriminate household robbers through advertisements. (claiming on house checks; disease, maintenance, etc...)
that's all i can think of.