This, but set closer to 200 or 100 ms (and for me, swapping the translate 8 and 18 so that the switch barely moves on mouseDown, because that's damn close to a real switch's behavior). This seems like it could be a good compromise to all of the people complaining about lag and others who understand that the visual system is powerful and movement is a huge part of that. Also, it's relatively simple as far as CSS animations go!