Other reviews always make you wonder if you can get a lemon and then take the expense and time to get one (or more) of them to replace them if they don't work. In my case, the COSTCO tire assembly shop had no problem replacing my Tacoma truck's factory tires with these Hummers. I was suspicious of them because of the negative reviews, and when COSTCO replaced my summer tires with winter tires last fall, I got control air. pressure reading I came to the conclusion that the TPMS system must have failed. But guess what, no, he did exactly what he was supposed to do, and the COSTCO tire technician said that when changing tires in sub-zero temperatures, it's not uncommon for a tire to lose some air pressure, which can drop. It's below the threshold and you'll get a warning.