A delightful idea, ... But I do love a good graph, so I gave the $699 litter box a try. (Note: The Litter-Robot 4 originally retailed for $649 at the time this review was initially published.) ...

With that said, let’s look at nine phases of the technology life cycle for robots. It's important to note that these are not strict, and a robot does not need to follow the exact sequence.

We compared the viral Litter-Robot 4 to Amazon's bestselling Meowant Self-Cleaning Cat Litter Box — here's how they measure up.

One of the first impressions everyone will have of the Litter Robot 4 is just how tall it is at 29.5 inches, and while the height of this self-cleaning litter box is nearly two and a half feet ...