TheWirecutter.com[thewirecutter.com] states: The iRobot Roomba 890 has essentially the same bump-and-run navigation system as the Roomba 690 with the upgraded cleaning hardware of the Roomba 960. We tested the older 860, which is the the same robot minus Wi-Fi connectivity, and it's a fine robot if you're willing to pay more to deal with lots of long pet hair or thick rugs but don't want to upgrade all the way to an advanced navigation system.
I personally own the 895 - it's the same as the 890 - and pitted it in a head-to-head test against the Hoover Quest 1000 earlier this week. The results are here.
Clean and schedule from anywhere with the iRobot HOME App; compatible with Amazon Alexa and the Google Assistant
AeroForce 3-Stage Cleaning System loosens, lifts & suctions dirt with up to 5x the air power
Tangle-free Dual Multi-Surface Brushes handle pet hair with ease; high-efficiency filter captures 99% of allergens, pollen, and particles as small as 10 microns
Full suite of intelligent sensors guide the robot under and around furniture to help thoroughly clean all your floors
Seamless navigation : a full suite of sensors enable your Roomba vacuuming robot to work its way in and around nooks and crannies of your home
As with most expensive electronics, I recommend using a credit card with extended warranty whenever possible. Many credit cards offer a free 12-month extended warranty, and many Citi credit cards - including the Costco Visa Signature - offer a free 24-month extended warranty.