Ok for everybody wondering if these glasses are any good...well...yes, they do what they are supposed to. There is some pro's and cons.
Pro's: cheap price ($20), decent 3D picture, easy pairing, better than passive 3d glasses in my opinion. lightweight, comfortable.
Cons: they dont provide a barrier on the side of the glasses, and are very fragile.
I only use these glasses for when my wife and I have company over, and our guests dont have a problem with them, they're too busy enjoying the 3d content. I wouldnt want to use these myself, as i have the 3100gb. For the money though, these are not bad.