GSM Alarm system for our van in storage

Just bought one. Playing with it today to get it up and running. Its a small motion alarm sensor with a mobile sim card. Any intruder and it will text and call me. Sounds good, I will update this thread as I use  it over time. Why did I buy it? 3rd break in to our van in storage in 5yrs..... Got to up the security, next time I should be able to give the police the exact moment those who cannot be mention due to their unique ethnicity turned up for their regular stopover touring our county....