I don't like these things, and I have very legitimate reasons as to why. I wear glasses and I love them, but wearing 2 pairs of glasses isn't fun...
It feels like my nose is going to cave in, and I have to constantly adjust them during the movie which takes me completely out of the film. They always have smudgy fingerprint or popcorn smears all over them which are IMPOSSIBLE to remove... even with my special eyeglass cleaning cloth, believe me I've tried. And as if the smears aren't bad enough, the dark coated lenses completely screw up the colors of the film. I take them off and the brilliance of the color shows through until I get dizzy from the double vision thing, and then I have to watch the rest of the film in a dulled down smudgy version knowing what awesomeness my eyes are missing out on. Plus, it's not bad enough being called 4 eyes when you were younger, but six eyes... yeeesh. 3D goggles (as I like to call them) just go away.