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 ...

Since the i7+ came out, iRobot has taken the dust covers off a newer model, the Roomba i3+. At launch, the iRobot Roomba i3+ – while still a premium robot vacuum – was relatively affordable ...