This is my second Viair 12 volt pump I have purchased. The first was a smaller capacity pump and it is still running very well. These pumps are very well built. They are quiet when compared to other pumps with the same capacity. I am using this pump to charge a ten gallon compressed air tank for demonstrations of an aerosol device at medical conventions. It is small, quiet, and will operate off an AC to DC 12 volt converter that puts out about 20 amps. This beats paying the $650.00 three day charge the exhibit halls hit you up with for a compressed hose at your booth!
My only other wishes are that it had a 12 volt fuse and an off and on switch. Neither of these things were a big deal for me to add.
I highly recommend this pump. It is good to see high quality workmanship in this day and age.