I suppose there is some disagreement about the need for a pre motor filter but I had a lot of black (probably motor brush dust). It took a little effort to mount the new one correctly. It's not a detail issue, it's just that the body of the vacuum cleaner is designed the way it was designed. Overall, the vacuum performs better and works great.
Vacuum cleaner Deerma DX118C RU, white/grey
144 Review
Xiaomi Mi Robot Vacuum-Mop Essential Robot Vacuum Cleaner, white
284 Review
iRobot Roomba 692: Smart Robot Vacuum with Wi-Fi, π€ Alexa Compatibility, and Pet-Friendly Features for Effortless Cleaning on Any Surface
138 Review
Xiaomi Mi Robot Vacuum-Mop 2 Lite RU robot vacuum cleaner, white
198 Review