I have glasses with Blutech applied and have used them for a couple years. The lenses are actually kind of orange, it isn't just a coating.

I can't say I really feel any difference day to day, but I do like them and feel they're more comfortable for a long day in front of the screen. If I could do it again I'd probably opt for a less noticeable coating. I get a lot of comments saying they look like "gunner" glasses.