The original manufacturer replacement parts are much better than the knock-off brands - but overpriced. The parts say they will last 6 months, but it seems they need to be replaced more like every 6 weeks (which is way too expensive). Strings and hair almost cut right through the rubber in a couple of weeks. Love the ease of having a robot vacuum, but it is way more money than you think it will be. Buy with caution (though if you are buying this, you are already invested).

It’s a great option to be able to buy my robot parts from Best Buy. These parts go through a lot during the cleaning process and work well.

3 Corner brush quality is very poor. Lasted only for 1-2 days. All 3 corner brush became useless in 5 days. Don't buy.

It is exactly what it looks like, all the replacement parts you’ll need for everyday use of the Roomba S9+. The filters get dirty very fast, at least with three dogs, but it still picks up very well, especially on our carpet in the place we are currently renting.

This is a great bundle of replacement parts needed for the Roomba S9 in one package. These are parts that need to be replaced on a schedule so you will need to replace them on your robot over time. The only thing not included is the bag if you have the S9+ which includes the docking station that dumps the bin automatically. I am sure IRobot did it that way so this kit can be used by both S9 and S9+ users.