I installed this security system on my car back in 2005. It is still operating, but it lacks a heck of a lot of bells and whistles that the new security systems have.
I like the python, because to me it says security. It comes with two three button transmitters, the ability to flash your parking lights to locate your car in a crowded lot, and the "Revenger six-tone siren" to ward off the bad guys.
I found the unit really easy to use. I did not opt for the keyless entry (wow am I old school) or the remote start. In retrospect I should have upgraded instead of opting for the cheaper base model.
All in all it offered the protection that I needed for an affordable price, and guess what my car never got stolen while using this system. I just would recommend upgrading a little bit the next go around.