This tire compressor is quite reliable right out of the box. I usually have one in each of my vehicles for emergencies or to inflate my sports equipment. The size of the unit is exceptional, much smaller then the ones I used to use. Its footprint take up very little space from the once i use, and the feel much more durable. To power it you have two choices: Lighter Plug or Battery Hook up. Having these options let are quite convenient depending on the situation. The down side would be the length of the light plug cable. It's not as long, but they compensate it by adding an additional extension air hose to make the reach which is awesome. It has a pressure set for how much PSI you wanna place into your tire, which will shut of automatically when the desired PSI has been reached. Decibel levels on this unit is a lot quieter then most of the once i use by at least 12 decibels. Vibration is practically non-existent, its very stable and does not rattle or shake when in use. It has a built in LED Light for when you use it at night with two power settings. For the pric