I won these in a rafle at a scenario game about six months ago. I had been using the mask that came with my 98 custom and it was terrible. That fogged up within minutes of me putting it on. The avatar however still has yet to really fog up on me. I've worn these for around an hour at a time without serious problems. Be careful when cleaning them though. I was cleaning all my stuff after an 8 hour scenario game and had a bucket of water on the ground next to me. My little brother thought it would be funny to throw my lens into the bucket. There was actually water inside the lens for a few days. Other than that, it's a freat mask.
This is a great mask for anyone really. I can't really say if it's worth the money since I got it free but, I would have gladly paid for it.