The robot zipped through our test room in a short average time of 25 minutes, too.
THE WIRECUTTER ROOMBA PLUS
You can link the S9 Plus to your home Wi-Fi as well. The app also lets you use Alexa or Google Assistant commands to tell it to begin cleaning a room. The S9 Plus can navigate and map multiple rooms and floors, while avoiding "keep-out zones" that you can designate. It also cleaned up more dog hair, pet dander and allergens than any other vacuum in this test group. That said, the Roomba S9 Plus removed an average 71% of sand from our medium pile carpet while vacuuming, which is the best result that we've seen on this specific test. While not the worst result we've seen (that honor belongs to the Ecovacs Deebot 600 at 18%), it's definitely near the bottom. The Roomba S9 Plus also struggled a bit cleaning sand from low-pile carpeting, earning a low average dust and sand pickup of 28%. It managed 36% on low-pile and 47% on midpile carpets. Its performance on carpets was disappointing though. With 95% sand removal, the Neato Botvac D7 still reigns supreme on that test.
![the wirecutter roomba the wirecutter roomba](https://cdn.thewirecutter.com/wp-content/uploads/2018/11/robotvacs-lowres-1352-570x380.jpg)
On hardwood floors this Roomba picked up an average of 93% of our test sand, the second-highest amount in our test group. It's one of the best robot vacuums you can get if money isn't a concern. For that staggering amount of money, this robotic vacuum delivers powerful suction and superb dirt and dust removal. That said, the iRobot Roomba S9 Plus has a whopping price tag: $1,100 (though sometimes it's discounted). Roomba vacuums are extremely popular, and this is my pick for the best Roomba of them all.
![the wirecutter roomba the wirecutter roomba](https://www.pricerunner.com/product/400x400/1871023749/Xiaomi-Mi-Robot.jpg)
If someone gave you a blank check and told you to buy the best robot vacuum, this would be the robot vac to get.