I use this thermo probe for over a month, and he never do default. Being in the middle of the kitchen (pro), I was looking for a reliable model, and reasonable price given my apprentice wage. I highly recommend this thermo probe to both amateurs and professionals, it is relatively easy to use (after having read the instructions) and is very accurate. Once we have we can not part with them, I use it for everything ... For cooking as for thawing, for caramel as for chocolate. I hold all the same said it is delivered without storage pouch, which is its only weak point.