The remote starter/alarm works great. You will have to buy the an interface module to have the alarm "talk" to your vehicle (something you won't know unless you call the company). The 1/2 mile range is not that far but works well in open areas. Places like the mall or WalMart have too much interferrance to get a clear signal. But, for warming up (or cooling off) the car from home or work it's perfect. I've only used the alarm a couple of times so it was just an added bonus with the remote start.