It is super fast! I work on the 14th floor of my building. I park outside on a surface lot. I hit the AC on the app before I get in the elevator (car has been 106+ at start) and by the time I get to my car (minutes) it is in the 70's. It is AMAZING! Game changer. I loved the remote start on prior cars, but you have to be range of the car to start it.