The worst UX I experienced was the gas stove at an appartment where you'd turn the knob all the way to get some sparks, while it blasts gas from the stove, to t

The worst UX I experienced was the gas stove at an appartment where you'd turn the knob all the way to get some sparks, while it blasts gas from the stove, to then turn it down to the level you want. The fun part was when you try to light it up but for whatever reasons it doesn't catch, so you're filling the room with propane and the second it might actually light up you're toast. Then if you turned it down too much it would die out, but you'd have to look below the pan to realize there's no flame anymore. Oh, and the toxicity of course. My IH plate also has common + and - buttons, but compared to the above I'm pretty happy with it. It also has a timer, and I'm ok giving up having 4 knobs for buttons that actually work and can be cleaned in one swoop, and having a single place where I can see the status of all the heating elements.