the other's are right you can buy an alarm cheaper then this that may work well.
before this groub buy was avaible i purchased an alarm off the net through a alarm retailer i picked it up for roughly 250,
the alarm came with directions but where not clear enough for me to install, i ended up paying 250 dollars to install at a local car sterio place.
they messed up, didn't install the "full" alarm and wanted more money.
i did have an alarm that worked good, and unlocked/locked my doors. but ended up paying a little more thne 500 when it was said and done (matrix rs 3.5)
my brother purchased my same alarm from tony last yeart for the groub buy,
every thing was very well put together and where it needed to be for the install, the wire lengths were correct, he wired in the turbo timer harness for the hks unit my brother already had.
he also has a very detailed installtion guide on the net that has sevral page's of pictures and note's,
also he goes through a step by step to hook up the alarm note's wire color's and trace colors. locations, j/b's and so fourth.
to me, this is a very cost effictive alarm cosidering my brother saved 150-200 over what i spent. and i thought i was saving at the time..
sure you can spend 120 on your alarm and install your self , but i like the peice of mind knowing i can be down the street and know if my door opens or the knock sensor goes off,
the remote show's a door open, hood/trunk open, or a hammer for knock/ vibration sensor,
also comes with a cool down timmer in the modle i bought , so that save's another 100 bucks. if you didn't already have one.
all in all, for the peice of mind i still feel this is a great buy.
i dont know about you, but when you have 10k invested on just the internals of your engine, let alone the 2k for stand alone, and another 4k for turbo, fuel, and hard pipes,
why risk all this on a 100 dollar alarm?
i do recomend having a starter disconnec/kill wire if your alarm goes off, even if you buy a cheap alarm,
my friend bought a cheap alarm and it had this feature, it was the only reason his truck and quad were not stolen, guy had the ignition on, and the alarm was going off, but he couldn't start it.