Convenient shape, convenient design, works exactly as described. I had an old inflator that was slow, flimsy, and had an inaccurate mechanical readout. It made a lot of noise but couldn't put out more than 45psi, which was useless on my compact backup that needs at least 60psi. This overcame the bearing pressure to 65psi in seconds and settled right to my setting. I don't have anything that would require more, but it seems like it could easily go much higher.