Definitely saves you time by just having to connect it up, turn the switch on, and then crank the car.I've used a couple times and had no issues with my older car. If you're the type that has accidently had the car in auxiliary mode, this is a good backup. Having the AC or heater on in auxiliary mode will drain your battery. When traveling or in the winter, always take it with you!
Rating: [5 of 5 Stars!]