Overall build quality is good for the price. It is primarily used to inflate bicycle tires (both Presta valves with the adapter provided and Schrader valves) and lawnmower tires. In these cases, it's very easy to add or remove a little air at a time to get an accurate print. The pressure gauge seems accurate and easy to read even at lower pressures. The only complaint about the locking lever. Mine requires you to hold the lever down, press the chuck onto the air valve, and then release the lever while holding the chuck down. If you don't hold tight enough, the cartridge will not seal well and will leak. However, after about a dozen uses, you get used to it and it doesn't matter anymore.