After the previous Thermometer for bath my son (9 months) has given up the ghost and the paternal wrist exposed to temperature control to be insufficient, I went in looking for a nice thermometer, preferably with suction cup. But one thing I did not, at least none that I liked. In my distress I bought the starfish and have to say I did not regret it! Operation is super simple, reliable and accurate thermometer and a green light indicates the optimal bath temperature (ideal for Fathers ... no more memorizing numbers and temperatures simply to behold the light :-)). The starfish swims also quite wonderful and my little rascal like to play with it in his bathtub. And if I remember, whereas the starfish was already thrown in the heat of the moment everywhere, so I can attest to the product and a good workmanship and robustness. All in all a strong buy recommendation.