I have two Compustar units.
Remote Start Systems
One of them is the 2Wss-s. It's good for about a mile. It's one of, if not the only, true one mile starters. I can sit in my office and hit my truck 3/4 of a mile away in the parking ramp. That is through concrete walls of the building and the ramp. HFantastic product.
The great thing is that it has a lifetime warranty. You just take it out and put it in the next vehicle, and it's still covered... forever.
Both of mine have a page back feature which is handy. You push the button, the vehicle starts, then pages you back that it started. It also pages you when it shuts it off after X minutes.
You can also see if you locked the vehicle or not, and you can lock and unlock it from that range.
I had a guy replace my windshield last year, he called and asked if I could come out to the ramp and open the truck. I told him to hang on, pushed the unlock button and told him "try it now". He thought that was pretty cool.

So did I!