If bad weather or the road scares you late at night, it's quick and easy. If your car tire is almost completely flat, you need a pump that plugs into an outlet. This one will overheat if you don't stop cooling it down. It's great for bikes or when the car just needs a few pounds of air. While there are limitations, the ease of use for small tasks makes it worth the cost. To make sure it's ready to go when needed, I've marked my computer's calendar to charge once a month. It's so easy and quick to use that I highly recommend it.