I have the Viper remote start/alarm. I originally wanted the basic remote starter, but the shop told me that the basic wasn't compatible with the OEM alarm (!). So I upgraded to the Viper combo alarm/starter, whic was $300 with installation, compared to the $180 Best Buy special that I had on my previous truck. However, the remote works from a distance of 300 feet, compared to the 100 foot range for the basic. Plus, I'm sure Viper has a better alarm than OEM unit. There is nothing like the convenience of getting into a warm truck on a cold morning....or a cool truck on a sweltering day....I recently moved to St. Louis from New Jersey, and almost everyone who sees the truck is amazed by the remote-start feature.....the VX always draws a cround (I think I'm 1 of 2 in the greater St. Louis area) and it's fun to start the car and watch someone who's gawking a liitle too closely jump out of his shoes when the bellow of the Powervault muffler announces that this beast has woken from its slumber.....