Reason why I like the iRobot Roomba vaccum is the iRobot Roomba j7+ doesn't lose suction performance because it immediately empty its internal dirt compartment when docked after finishing its task. High-pile carpet is an ideal surface for the iRobot j7 compared to either of our earlier versions, the iRobot Roomba j7 is a lot smarter and more effective. To help it better avoid obstructions, it has a camera installed. The front-facing camera on the J7 helps users avoid obstructions, such as bothersome floor wires.