It doesn't matter what alarm you get if it has a poor install the car is still easy to steal. ie, if you can see any of the alarm wiring after ripping all the lower dash acrylics off, the install isn't good enough. To do it properly involves removing the dash etc, then removing the dash and body looms from the front of the car, unlooming those, integrating the alarm loom into the factory loom with the control module in a totally inaccessible spot (read: have to remove dash pad to get at it...), then re-loom the factory loom with integrated alarm loom and re-assemble the interior. It takes a good few days to do it properly. The same-day alarm installs are good for rice factor only. The siren in the engine bay is also a bad idea because it's so simple to pop the bonnet and smash the siren with a mini sledge. The external siren should be mounted up inside a guard cavity where you cant get to it without removing the wheel, guard liner etc, a good installer will also remote-mount the siren keyswitch somewhere else so you can access it when required. The dealer-installed Brant system in my old WRX was done so poorly I took photo's of it and sent a letter to subaru with the pics, it was an abortion to say the least.