I happens to have a chance to compare two protector screens side by side. Left: some $20 samuri brand protector bought off Amazon. Right: HD anti-glare film.
Probably not as apparent in the picture than in real life, the image on iphone with power support seems washed out. Also, with the power support film, there are many tiny color distortion apparent all over the screen, making the image not as sharp as the original. Not to mention the "Anti-glare feature" does nothing more than making the glaring light source even destructive by blurring out more of the screen.
In summary, besides the easy installation, there's nothing good I can say about this product. I am very disappointed and will probably dump it and go commando afterward.