Had one installed on the wifes Highlander. They came to my job and installed it in the parking lot. It took about 3-4 hrs. Best investment ever! Now my wife and kid won't freeze anymore waiting for the car to warm up.
The damn thing can start the car 1000 ft. away. Good when you are at the mall. By the way you still have to insert the key in the ignition and unlock the car with the remote (car stays looked while warming up). If you forget you started the car it will shut down by itself in15 to 20 min. It will also shut down when you press on the brake if the key is not in the ignition in case some a$$hole tries to jack you $hit.
All and all pretty good stuff I hope you enjoy yours.