Bests & Worsts Reviews from Amazon

I already owned one of these for several years. I recently bought another from Amazon of the exact same brand/model, to have two. I use them for cooking and testing the hot water temp out of the kitchen tap. Would you believe they disagreed by 11-12 degrees F or more? Same tap, one says 121 and the other 150. So I brought a pot of water to boil to see which one is closer to 212 (sea level of course - I am about 600 feet up in the Chicago area so boiling temp should be a little lower). One got to about 210.5 and sat there. Good enough for this price. The other was all over the place. I tried adjusting the temp via the calibration screw. That did not help. I don't know which thermometer was new and which was my older one - they look identical. Makes no difference really - the one off went off to the trash. If you rely on the temperature the Taylor gives - it does register to tenths of a degree - get a second opinion, or do the boiling water test.