As smart vacuums go, there’s a lot of space between the very best, and the very worst. Residing in the middle are all sorts of robotic cleaning devices, some of which barely qualify as a vacuum. The Ozmo 930 sits comfortably near the top of available options, while falling just short of the peak. To be clear, it’s good. Real good, in fact. Its struggles are similar to those of any other oversized hockey puck-shaped robo-vacuums I’ve tried to date. It’s going to get stuck sometimes, shoe laces are your worst enemy, and it’s never quite going to get those…

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