Answers only from people who have bought or tried them out, please.
My friend bought a pair and we both found them to be pretty dumb. Basically they seem to filter light similar to how things look under a blacklight so that white things show up as brighter. What they don’t mention is that this works for anything that is white or light colored and since you can’t really see very well through these things except color differences it ends up highlighting every little bit of junk on the course and not just balls. This was especially brutal on our regular course as there are a lot of cottonwood trees on the back 9 that dump white fluffy seeds all over the place like snow during this time of year.