39dollarglasses.com - anyone order from them?

[slackerinabox]

I'm going for an eye exam tomorrow and am thinking about ordering a pair or two of glasses online.. Anyone have any experience with 39dollarglasses.com? I'm especially interested in the quality of their lenses... The basic lense is supposed to be thin polycarbonate lenses- are these really thin? I mean, I usually pay $50 EXTRA to get thin lenses locally.. Is this the real deal or a gimmick? Thanks!