As we know, 9 times out of 10 these things are gimmicks that don't improve on the tried and true method but occasionally, likely by chance, the gadget marketers come up with something. What kitchen gadgets have you put in your rotation because they just work?
For Christmas i got re-gifted a "Copper Chef Perfect Egg Maker" which is really just an egg steamer. i assume you can get many versions of this. Well, it works beautifully. The person who re-gifted it to me didn't know that our family has hard-boiled eggs for breakfast virtually every morning. This egg steamer has been used every day since. It cooks the eggs perfectly in 18 minutes and every egg I've made has been ridiculously easy to peel (unlike the boiling method). Highly recommended if you like hard-boiled eggs.