I had hoped to use this as a glare filter, and it partially accomplishes that objective -- but the drawbacks are big enough that I've stopped using it. Here are the biggest things that bothered me:
(1) The adhesive tabs that came with it don't work very well; the filter is heavy enough that it pushed the bottom ones out of place. I ended up getting some very large rubber bands to use instead.
(2) It vignettes the screen. Toward the edges of the screen, the brightness drops off a lot unless I move my head to put my eyes directly in front of that part of the screen. Obviously this wouldn't be as bad on a smaller screen.
(3) It causes some blurring of the screen. Everything is still readable, but nothing looks as sharp.
(4) It causes a little desaturation of colors. Everything looks slightly grayer.
I had hoped to use this as a glare filter, and it partially accomplishes that objective -- but the drawbacks are big enough that I've stopped using it. Here are the biggest things that bothered me:
(1) The adhesive tabs that came with it don't work very well; the filter is heavy enough that it pushed the bottom ones out of place. I ended up getting some very large rubber bands to use instead. (2) It vignettes the screen. Toward the edges of the screen, the brightness drops off a lot unless I move my head to put my eyes directly in front of that part of the screen. Obviously this wouldn't be as bad on a smaller screen. (3) It causes some blurring of the screen. Everything is still readable, but nothing looks as sharp. (4) It causes a little desaturation of colors. Everything looks slightly grayer.