Microwaves have such terrible UIs. I always wanted to make an online Microwave UI simulator where it generates a random Microwave control panel and you have to work out which buttons to press to heat up some soup.
Seriously, once you've used a micdowave where the +30s (or +1m) button is the same as the start button, you'll constantly be wondering who thought it made sense to do it any other way.
