Here’s my opinion (if you care):
I have purchased two sets of these from Woot! over the past year. I have purchased both the "Weezer" style and the MW3 style. I am currently wearing the Attache Phenom, the set I was given at work.
The Phenom's are phenomenal. They are perfectly fitted for my head. The lenses cover the majority of my peripheral vision and all of my direct vision. They frames are solid and take a decent amount of abuse. Yes I've sat on them. They also look pretty stylish, if I leave them on and wander the office building I usually will get a compliment or two. However they are $73 from Amazon.
I am very pleased with the MW3, for $40 I received in addition to the glasses both a soft fabric pocket and a hard case (albeit a kind of cheap case, but a hard case none the less). The frames are comfortable for about 3-4 hours (I don't wear or need glasses/contacts). The frame is also quite rigid, like the Phenom. The lenses actually cover almost all, if not all of my peripheral vision. The only complaint you could say I have is that they are ugly. They just look goofy on my face. But I only use them when I'm up gaming late at night or on a hangover day, so I don't really care.
The Weezer glasses look great, and function exactly the same as the other two. That however is where it ends for positives for the Weezers from me. They are thin flimsy frames, like the ones you expect from a pair of Wally World $5 sunglasses. They frame is not comfortable; I can stand about an hour, maybe two wearing them. The lenses also have very little coverage, and while motorcycle riding has acquainted me to obstructed peripheral vision, I find the frames and lens positions to be distracting. Overall, unless you like the flimsy frames, I would purchase something else.
As for my opinion on the general overall use of Gunnar Optik's, I use them daily at work. If I have to write code or write some of those stupid safety reports, they are on my face. I love them for that. No longer do I get headaches or eye strain from staring into a screen for 8-10 hours only stopping to take a smoke break or potty break. However at home, I rarely find myself using them. If I've been drinking the night prior and I taking a lazy hangover day, they work great and I use them. But 9 times out of 10 I don't use them to game with. As for it giving you an edge, well maybe that magnetic bracelet will work better for you...