Whether bath water, milk bottles, Sunday roast or room temperature: The part tells me within seconds how warm it is level. I also use it to research if my daughter is dressed too warmly. For this I push it to her just behind the collar within the clothing until the middle of the back. You do not mind it and I know if she is sweating or not. Clear I can too check different, but I must not change from its current location it. Only at the rectal body temperature measurement of small, I use another, namely calibrated thermometer. That I then afterwards do not want to measure the milk with the part that lights a hope.
Conclusion: For the price strong buy recommendation! Only Who needs a calibrated thermometer and must rely on absolute accuracy, more money should be invested.