Happy with this purchase
This filter is easy to install. The 2 magnets stuck to the screen are thin. I was worried that my screen wouldn't close completely, but my PC (Lenovo T14) closes just as before.
As far as privacy is concerned, without expecting a miracle and without having measured the angle, it seems to be enough for a neighbour who isn't too curious. For the user (i.e. me), the loss of brightness is very slight. With or without the filter, I can see just fine.
The pouch supplied is sturdy and will come in handy in my bag to protect the filter.
I gave it 5 stars because it seems to be a very good product. Only time could change my mind.