The build quality is very good, plastics are of good quality and the magnetic foot is perfect. To find the location that best suits it is best to install the sensor temporarily and wait 24 to 48 hours before installing it permanently. For the accuracy of the clock, it's really the ultimate ultra + in the matter. The temperature also seems correct, it should be possible to compare several different thermometers placed in the same place to judge the reliability of restored temperatures. However, the weather forecast pictograms are extremely fanciful or announce the time several weeks in advance :-) proof, in the last great heat of August, the icon was on "rain"! Apart from this remark, it is a good article whose price / quality ratio is correct.