Not so with iRobot’s new Roomba i7+ ($950), which empties itself. While the device is powering up, a separate vacuum inside its base charger sucks the dirt and dust from the Roomba’s innards ...

This removes the problem of having to quite frequently empty the bin yourself. Even better, the Roomba i7+ intelligently maps your place on its first 2-3 cleaning missions. Once that's done ...