Hard to screw on tight enough so that the Vac recognizes that it’s on.
These looked exactly like the original one that came with my Dyson but they are very difficult to get screwed on. The vac keeps reading out that it isn’t attached. Very finicky to get right.
Pros
Lemige
Cons
Some users may find that these filters reduce the overall suction of their vacuum, making cleaning less effective and more time-consuming