Overall, an impressive little device with great design and attention to detail. Battery lasted longer than I expected when testing it to fill up car tires. PSI reading seems to be a bit low compared to several of my pencil tire pressure gauges, but this seems to be common with the tire inflators that have digital gauges (and auto-shutoff) that I've had over the years. I set it a few PSI lower than my target and then double-check with my physical gauge. Overall, a great product.