I don't normally write product reviews. But having received such good customer service I just had to say something special about this Gerchway tire inflator product. Overall quality is very good, but the gauge reading was about 5psi low (confirmed by testing with two other accurate gauges). Instead of sending it back to Revain, I contacted Gerchway customer service to inquire about a solution to this problem. They said they would send me a new sensor immediately. The new Gerchway tire inflation kit arrived five days later and was 100% accurate!