Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Inaccurate, hard to read gauge and chuck must be perfectly aligned...

I returned this item. I agree with the other reviewer that the chuck must be perfectly set in order not to leak. At the same time you are trying to get this right, you must ensure that the gauge is turned to face you if you want to read the numbers on the psi scale. Since the gauge pops out, you can't tell which side the psi readings are on until it is out, and I often found it facing the other direction. Lastly, I found the readings to be much higher during inflation. Once I released the chuck, and then reapplied it, the readings (confirmed by separate gauge) were easily 10% lower. For the price, it looks good. But I'm going to buy a different inflator that is higher in quality.