I purchased a pair of Gunnar glasses about a month back. About a week after purchase, as I was taking off the glasses one day, one of the temple pieces broke off. I sent them a mail but didn't get any reply for 4-5 days. Then I posted my complaint to their Facebook page and was told that someone would get back to me. That "someone" did finally respond to my mail and told me to send photos of the damaged frame. I mailed them the pictures and again no response for 2-3 days. Then some guy calls me up and says that they can't make out whether the damage is due to a manufacturing defect or mishandling, so I had to send them the glasses. BUT, they have a replacement period of 14 days only (out of which they wasted more than a week themselves). Now, even if the damage was due to a defect, they would have to send it to the US to get repaired and the courier charge (around Rs 2500) would have to be borne by me! Plus whatever the repair charge. The glasses cost me around Rs 4000 (+ Rs 700 for a carrying case), so no way was I gonna spend 3000+ bucks for repair and told the guy that, to which he replied that I should try getting them repaired at any local optical shop. No luck there either, so now I have to tape up the glasses to use them.
About the glasses themselves, they do reduce eye strain a bit but don't miraculously make you a better gamer. Certainly overpriced for what they are. And if you happen to break them (very likely considering how flimsy they are), don't even bother contacting the company.