Hello, my name is Jack (MR.PUTTPUTT). I will do my best to assist you today. I am sorry to hear you are having problems with your former renter.
I sold the viper brand for a few years and have had other also but the viper is by far the best I have used in our area, keep in mind you get what you pay for if you by a 100.00 unit instead of a 500.00 plan on not being happy the new vipers now you can link to a smartphone, and are very very good. I do not sell these anymore because of the small town I moved our shop to in the last 2 years but I do sell the car remote starting versions. but with the type of problem you may be having such as damage from a person, then there is not really a product that is going to stop a baseball bat to a windshield. but as far a being a great alarm and being able to get notified viper is the way to go. like I said I have sold viper, ready start, bull dog, cool start and I use the viper
let me know if you have answered your concerns or if you have more questions
So what do you recommend?