They say that it slightly underestimates the pressure on the indicator (0.1), but it's hard for me to check. Some pros: In general, a good device. Relatively quiet, comfortable, light enough. The pressure gauge is digital, which adds to the comfort. It switches off automatically when the set pressure is reached. This set pressure remains in memory. Some cons: Maybe not the most compact device, but this is a design feature, since the compressor is immediately packed in a tin box. I would also like some kind of light fabric bag for boxing or something like a braid, since the fabric handle is already there. I have it in the trunk in a toolbox and other things, I just made an impromptu case made of bubble wrap for it so that it doesn’t scratch and doesn’t beat.