The RobotShop Ultimate Challenge is moving along quickly now; the Roomba 500 series has completed all the tests and its final score is now available. If you recall, the robot vacuums are being scored by 15 different performance tests: how well they pick up debris, how fast they clean, how loud they are, etc. With the Roomba 500 series' results now in, you're going to have some cold hard facts to back up your purchase decision.
This is a companion discussion topic for the original entry at https://community.robotshop.com/index.php/blog/show/robotshop-ultimate-challenge-results-in-for-roomba-500