For years I struggled to get the right amount of air in my tires without much effort. My little air pump was difficult to connect and took as long to disconnect as it did to fill a few pounds of air (sometimes 5 minutes or more of waiting in hot or cold weather). It's sooo easy! Started the engine, plugged the end into the cigarette lighter, connected the hose to the tire, selected psi and quantity, pressed the power and PRESTO! After a few seconds, the display showed I'd added the correct amount and it automatically turned off. All I had to do was unscrew the tube from the tyre, put the cap on and keep inflating other tires and a few minutes later the little pump was back in my trunk waiting for the next time. WHAT ELSE CAN I SAY! I JUST LOVE IT! I am a 77 year old woman who gets her car serviced (when possible) and this is a really big help. Thank you Bosnian!