Very much advisable in my opinion because the stock alarm has no vibration sensor. What if somebody decides to smash your windows without breaching your doors. The alarm wont go off because the doors and hatch remain closed. So better invest in a good car alarm because nowadays, the crooks and thieves are getting aggressive and creative in their style. I leave it to your good judgement Sir mechwarrior. i would suggest GT808 or Autopage, both with Turbo timer, the turbo timer comes in handy when you come from a long drive and the engine and oil are still hot and you can't turn off the engine quite yet because it will break your CRDI engine in the long run and shorten its lifespan, so what the turbo timer does is you can remove your key from the ignition while engine is still running until it cools down, maximum setting for the timer is 2 minutes. So if your in a hurry to get to where you need to go, this becomes very useful so your engine still has time to cool down. Capiche? Joke. The GT808 is worth 4k from Maspro i think
