Fill/exhaust valve and gauge design is superb! The Astro Inflator gauge reads the same as my Accugage gauge. So now I only have to rely on the Astro pump to check the tires. That saves a lot of time. One downside: while the Astro hose attaches to the tire valve with no leaks in most cases, the connection to at least one of the four identical valves on each car will leak and the hose must be held down. Descent. All in all, this tool allows you to maintain the correct tire pressure with joy.