I had a compustar those are pritty nice especially the 2 way system. Be sure to get an extra battery, motion sensors in your car, and dyno mat your doors. Also don't forget sensors on your window. This way your car is very difficult to steal
especially if you put alot of money into it, but there is always someone out there that can get threw everything. However, the compustar comes with gps tracking with their top of the line and its a great feature. I had it hooked up with a lojack system also. My car was never touched
just my 2 cents
Koya