Bests & Worsts Reviews from Amazon

First, this pencil type gauge does not produce repeatable measurements. In a group of five measurements made on the same large automotive tire, the readings varied by 4 psi. That's 10% of the inflation pressure of the tire. Second, the gauge isn't accurate. The group of five measurements averaged 44 psi, again on an actual inflation pressure of 40 psi. A ten percent error either way is unacceptable in any gauge measuring tire pressure, especially when it's used on motorcycle tires. Third, when I tried to return the item, which is sold by Tool Deals but fulfilled by Amazon, my Amazon Orders page told me it was non-returnable. When I looked up the Tool Deals return policy, it referred me to the Amazon.com return policy, which is 30 days. So I called Amazon, who issued an Amazon gift certificate for the cost of the gauge. Thanks Amazon, but I'll never purchase anything from Tool Deals again. It's worth noting that a growing number of people are complaining about this gauge in the reviews, but because there are so many reviews, that number is relatively small and the gauge comes out with an overall excellent rating. Seems to me that the folks that give it a good rating have no way to assess either the repeatability or accuracy of the gauge, and aren't even aware of how far off their tire pressures are as a result. Buyer Beware!