We have the thermometer in use for 1 month and it still works properly.
- The only drawback in my opinion is that the thermometer after a certain time goes blank (about 30 min, useful if you forget to switch it off), depending on the amount of boiling water is after this time the desired temperature but not yet achieved. For me, this is however not a problem. I put the thermometer later simply pure or switch between by just again on.