Would be great if it didn't let in so much air. Works very well with my truck tires but not at all with bike tires. Releases all the air in 2 seconds, when you try to fill it, you need to inflate too much, then aim to shut off in time. The first 3-4 inflation attempts worked better - there were no leaks. But today I tried several times with the same tires and it was just impossible. I think it's missing a gasket that broke/fell out, but I'm not sure if it was there to begin with or how to find a replacement. The spacers in the accessory kit are too big for everything, I'm not sure of their purpose.