Is this alarm any good?

It's a Crime Stopper CS 2002DC. It's the least expensive one at Wee Bee and I was just wondering if theres any reason I should stay away from it or not.

Heres a link to the site:
http://www.bass-enterprises.com/browseproducts/Crimestopper-CS-2002DC.html

you get what you pay for in alarms--stick with dei products: viper, python, and clifford.