Dreame X40 Ultra review: Autonomously cleans floors, and even itself

The new Dreame X40 Ultra is one of the most innovative robot vacuums on the market. It builds on the recently released X30 Ultra, adding a new flexible side brush (similar to the Roborock S8 MaxV Ultra) and an improved 12,000Pa suction power, one of the highest we've seen on a robovac. It also has hot water mop washing and even a self-cleaning dock, making it one of the most innovative models, at least on paper. Sadly, it's also one of the priciest, so let's see whether it's worth your bucks.