Intelligent Event in Google Analytics helps to build traffic rules to get alerts on daily, Weekly & monthly basis.
* You can get alert based on the rules / conditions set by you on daily / weekly & monthly basis
* If you are in US, you can get an alert through SMS
* You can set Custom alert for multiple property
* You can use only one dimension & metrics to set an alert
* You cann't use filters in the alert
* you cann't get alert through SMS, if you are outside US
If these pain points are rectified by Google, Intelligent alert becomes very scalable & versatile feature to use.