This is a particularly clever episode. Take a little The Terminator, add a dash of Wall-E and take a light dusting of The Ghost And the Darkness (?), and you get Three Robots.
It’s also fun, and I like the tonal shift. Another good thing is that there are no human characters, so we get to skirt the uncanny valley.
Easily as good as Sonnie’s Edge, though for entirely different reasons.