100%. I got the lowest deductible under the vandalism portion of my car insurance after seeing so many friends get their cars broken into and the insurance cover nothing! Most are at least $500 and don't even cover the window. The insurance companies know this and know that most will want the highest deductible and they all know the average cost of a window. I think it cost me 4 bucks more a month and my deductible is $200. This will cover a window easily. Usually my newest car is parked in the garage and I never leave anything of value in the car but it's worth it if your car ever gets broken into IMO.Generally speaking, you're going to spend a lot of money in legal fees explaining why you shot a kid that was stealing a $300 GPS out of your truck.
EDIT: The most expensive single thing in my house is my fiancées engagement ring and while it's not worth my life it would be a cold day in you know what before she gave it up!