It's an Audiovox product...their stuff is hit or miss. The Code Alarms (made by Audiovox) were real pieces of shit.
Look into something from DEI...can't go wrong with them IMO.
http://www.directed.com/security/python/pyth_led_2way.asp
We sell those for $350-$400 installed, and they can be had for cheaper. Install will run you anywhere from $1-200 in most cases, so keep that in mind.
Also, you may want to look into proximity sensors, glass sensors, back up batteries, air horns, etc. if you have a lot of money invested in your car...I suggest going out to shops and talking to them about alarm systems and what your options are.