I had the EVS2 with sentry key installed about 2 months ago. Within 2 weeks, the alarm activated when it was supposed to be turned off. On one occasion, the alarm went off and it wouldn't stop. I had to drive the truck away from the parking lot because it was attracting a crowd. (yes, I was driving the truck down the street with the horn honking and lights flashing - I guess the system doesn't have a starter disable switch!) After about 3 minutes of driving it finaloly stopped. I took it to the dealer the next day, the dealer couldn't duplicate the problem, but suspected that it was the door sensor - which they replaced.
Alarm was fine until I tried to start it last night at the airport parking lot. Apparently, it had repeatedly triggered over the 9 days it was parked, which left my batteries dead!
This alarm sucks, the dealers just slap them under the dash, without any kind of configuration. The infrafred system is a joke. As a test, I armed the system while I sat inside and waited for the alarm to arm. Then I moved around in the cab, no alarm. What kind of infrared doesn't detect a 220lb person moving around the inside of a truck?
I will keep the Sentry, but ditch the EVS2. By the way, the dealer has already tried to tell me that once the ITS is installed, it can't be removed, because it has already been imprinted into the computer.