We use the thermometer now for almost three years! We love it. During fever period of our daughter we decided to try the device. She had tired of be measured rectally and that was the perfect solution. The children's ward in our hospital uses the same equipment. It's incredibly fast and is very accurate. Usually one wants to know if the fever is high or moderately so. And since it does not matter if it is 39.6 or 39.8 degrees. We always measure both ears and often determine the average. But we never had greater differences than 0,1-0,3Grad. We would buy it again and again!