It is after reading the scores that I finally understood why it worked wrong !!!!!! There must be up to 60 minutes to tighten the spring and then go back to the desired time even three minutes for a boiled egg !!!!!! And in fact indicated on the packaging without explanation !!!!!
Otherwise timer makes serious, solid brushed aluminum, very powerful magnet to stick it on an oven or fridge!
So no problem! Of course we will see over the long term !!!!!!