I've tried a few robot vacuum cleaners, and while they can be useful, they inevitably have a big flaw: at some point, you're going to come back home and find that it's got itself caught up in wires, or shoelaces, or something.

Sharp's new Cocorobo model has an app that allows you to remotely monitor it; you obviously can't use it to extract a blockage from the brush, but you can give it more precise directions around your home via a neat little digital map. 

I'd like to try one, but $900 and Japan-only are pretty big barriers to entry!

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