Personally, I don't use a compustar, I just have a cheaper japanese 2 way, and this thing is effective!! The sensetivity is cranked anyone touches my car it goes off. Ignition kill is just a simple relay setup that can be added to just about any alarm! Def. get something that will ease you mind!!! In my situation, since I park my car 10' away from my bedroom, I know even if I didn;t have a 2 way, whoever touches my car gets hurt right quick!!!lol.. Just my 2cents