Bought one for my dad three years ago for Christmas and he absolutly loves it.
He lives in upstate Pa, has a garage thats about sixty yards away from the house.
Gets up in the morning, opens the garage door via remote and then starts the car via remote. VERY handy when it's cold out. Same thing when he's bowling, out eating dinner. Have to admit that when I'm visiting him or he's down at my place, when it's cold, it's a nice feature that I could get use to myself, only that all my vehicles are a standard.
Came with two sets of remotes, the remote will confirm the car has started, remote will open/lock the doors and open the trunk as well.
Only procedure that changes thats not "normal" is that once you get in the car, you only turn the key (once you put it in) "half way" then hit your break to change gear. If you hit your break first or turn your key "all the way over", the car will stop running and you have to restart either manually or via the key ignition system.
Bought the kit off a local guy up in Pa that I knew was REAL good with this, it took him ALL MORNING to install it (took some "creativity" on my part to be able to surprise my dad with it). I did read an install manual on it it, and considering it was a present, didn't want to srew it up. Since it took this guy all morning to do it and he knew what he was doing, glad I went that route.
Guy who installed it had his own shop, cost me about $400 for the kit and installation.
Haven't had a problem with it since it's been in other than replacing the battery for the remote starter.
If you live where it gets cold, it's one of those things you'd be glad you have it, and you wonder how in the heck you got along without it before.