I was really surprised by the reliability of this little digital tire gauge. It has been super reliable and accurate. I also really love the blue led light up screen as it makes it so easy to read and is very helpful if you ever experience a breakdown in the dark or not so well lit area. This is so much easier to use and a lot more reliable than the old manual tire gauges. I keep this in my car for emergencies and regular tire maintenance. It is also convenient for airing up bike tires as well.