I think it's a pretty good idea and cheap if it WORKS (Better than having no alarm)

Features

Detects shock, glass breakage and voltage drops
Wireless design makes it an easy do-it-yourself installation, no need to wire throughout the car
Siren mounts anywhere under the hood with double-sided tape
Attaches directly to battery terminal for power for the audible alarm
Sensor plugs into 12 V accessory port



http://www.canadiantire.ca/browse/pr...a1aec89d04f19e

 

looks pretty cheap to me.
JMO but save your $ on this one.

 

get 3 of these and you are set.

 

i want this one (maybe NSFW)

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this one is cool too
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this one is my fav

 

^LOL classic
Forgot to post Microfibre Cloths, 8-pack

Sale: $3.99 (Last day 4 sale)


http://www.canadiantire.ca/browse/pr...romSearch=true

 

those ones leave fuzzys EVERYWHERE good for apply wax by hand though. I bought up a ton last time they had a sale on these