I wanted to love it but I can't. An absolutely accurate and easy to read psi pressure gauge? That's great. As for the air cartridge? This is not Bueno. If you only use an air cartridge a few times a week or so, you'll love it. If you have about 35-40 gear tires that need to be checked and filled daily, this is going to drive you crazy. The product appears to be of high quality, but there is something wrong with the needle valve. You have to let the lever "float" when filling with air in order to get a reasonably unimpeded flow. But if you press it all the way down, it cuts off the air supply and filling takes forever. Another tap is the only way to release the pressure - disconnect it from the air supply and use the main lever, there is no dedicated bleed valve. .