Credit: Jonathan Feist / Android AuthorityA robot vacuum is only truly useful if it does its job well and genuinely saves you time. Otherwise, you’ve bought a circular roommate that demands attention. The Roborock Qrevo S5V did a sparkling job of impressing us, earning a 4.5-star score in our review, and it’s now down to $599.99 at Amazon.That’s a 33% drop from the $899.99 list price, and the discount applies to both the black and white models at the time of writing. We already liked the Qrevo S5V as a sub-$1,000 robot vacuum and mop, with our reviewer praising it as a “well-priced robot vacuum and a highly-capable autonomous floor cleaning system.” At $600, it’s a no-brainer if you’re in the market for a new cleaning robot.