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I bought it to control the temperature to cook yolks in custard like preparations. The reaction to a temperature change is too slow for this purpose. The scale is a bit small to distinguish a variation of a couple of degrees. I will have to try a digital one. The calibration was pretty straightforward after checking YouTube. It is accurate, but it takes to long to stabilize.
This thermometer is horrible! I bought it because I make homemade yogurt for my daughter and the temps have to be precise. I had to recalibrate it before I used it and it seemed to work good. But since then I have used it on both meat and boiling water with false readings. It would not get above 190 for the boiling water. It also takes FOREVER to show a temp and who has that kind of time while cooking.
It was very hard to get calibrated as well. We bought a different thermometer last night to replace this one.