I have not used the ear thermometer much yet because it is not recommended until after the age of 2 but I love the shape of the rectal thermometer. The regular thermometers are so long and skinny it felt like I was shoving them in the butt too much this particular thermometer, the shape of it helped me gauge (on a SQUIRMING baby) how far it went in. I have never had a problem with it's accuracy and it is the same brand as the "regular ones"... I would recommend the thermometer to any new mom.
Our pediatrician recommended taking a rectal temperature until our child was at least 2 years old. It was stated that it is the most accurate for temperatures. We received this as a gift. We had to use it recently and it was very simple to use.