People have been arguing about the utility of robot vacuums for as long as there have been robot vacuums. Some feel they're just expensive gadgets with extensive limitations, while others see them as important steps toward a real-life Rosey from The Jetsons. While reviewing the Roomba i7+, Engadget's Devindra Hardawar thoughtfully weighed the pros and cons of iRobot's latest model, the i7+. It's quieter and offers a much-requested self-emptying feature, but it's also quite expensive and requires proprietary bags. Despite these trade-offs, it still earned a solid score of 87.