Roborock Saros 20 review: A smarter, more refined robot vacuum, but is it worth the upgrade?

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I've tried several of Roborock's robot vacuums over the years. Its new flagship, the Roborock Saros 20, is not a major year-over-year upgrade from its predecessors, but it does have some compelling features.

Tyler Hayes/Business Insider

The best premium robot vacuums and mops will take frequent house cleaning off your schedule. They're helpful without being intrusive or distracting. The Roborock...