The iRobot Roomba s9+ just hit an all-time low price during day 2 of October Prime Day

Robot vacuum users tend to agree that you can't go wrong with a Roomba, but the iRobot Roomba s9+ has long been one of the most sought-after robot vacuums since its launch. For Amazon's Prime Big Deal Days sales event, you can get a Roomba s9+ for $500, the lowest price we've ever seen this powerful vacuum hit. 

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This self-emptying robot vacuum can handle dust, debris, and pet hair for up to 60 days -- that means you can go up to two months before changing the bag inside. The biggest reason for such a huge discount is that iRobot has already launched two flagship products since the Roomba s9+, including the Roomba Combo J9+ and the Roomba Combo Max 10. But that doesn't discount how well the s9+ can map your home and keep your floors freshly vacuumed.

"The Roomba s9+ stands out among its competitors because of its "D" shaped design, which gives it the ability to better fit into the corners of your home," said ZDNET's Beth Mauder after testing the S9+. "The Clean Base is slim, slimmer than most other models. This ensures the robot is less of an eyesore and won't take up too much space in your home. The dual multi-surface rubber brushes are 40% larger than its predecessor and help to pick up anything in its way. But rest assured, the AI technology intelligently works to avoid common household objects such as cords, shoes, and socks."

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The Roomba 9+'s shape helps it reach dust that other robot vacuums leave behind in corners and under some pieces of furniture, so you never have to worry about cleaning behind it. And if you're into true hands-free cleaning, thanks to iRobot OS, you can trust it not to get trapped on cords or socks on your floors. 

"I love the Roomba s9+ for its ability to intelligently and efficiently clean your home without requiring any supervision," Mauder added. "Simply schedule a cleaning job ahead of time or open the app when you're ready to vacuum and you're just a few taps away from clean floors."

If you'd like to go even further, you can combine the Roomba s9+ robot vacuum with an iRobot Braava Jet m6 robot mop, available at 50% off for $249.