I heard about those, actually. Didn't look into it too much yet. I want to try them out now, but I already have costly lens glasses. Apparently they have issues in low light conditions. And also, there's the question about actual color accuracy. The glasses don't perform magic, what they do is remove some wavelengths to make the image less "confusing" to interpret. But at its core it's still a process that removes information, and it may very well be that this is not desirable.
