This should make it easier to check/adjust the tires on our van before driving. The actual pressure value is important to me, but more importantly all tires are the same. I haven't officially tested the accuracy, but it seems close enough for my needs. The part that goes over the valve stem is a little tricky, I haven't quite mastered the technique to get it right the first time, but once you get it on it becomes super easy. The ability to add air, check the pressure and deflate if needed isโฆ