They worked well when I used them twenty years ago and I see no reason they would not work today. They are a lot less intrusive than hoods. IMO they fell out of "fashion" with the advent of truly flat screen monitors that are less subject to glare. With my laptop I find that simply tilting the screen forward a few degrees does a great job of eliminating glare. It works on my 27" monitor as well.

If we knew what it was we were doing, it wouldn't be called research, would it?

— Albert Einstein