Ineffective fasteners
Bought for my Lenovo laptop.
The adhesives on the magnets never really stuck.
For a while I used the filter, putting them back on every time it fell out (like every 15 minutes), but now they really don't stick anymore.
There are 6 little self-adhesive fasteners to tide me over, but I don't think they'll last long, I'll end up using glue or a new filter.
At that price, I regret my purchase.