too bad it doesn't work
He didn't follow directions that were printed on the can, i.e. sprayed 1 layer as opposed to the recommended 4 layers. The hazing is definitely an issue. Also, where there is friction, there is wear. Therefore, it can not be permanent.
A better review can be found here: http://gizmodo.com/neverwet-review-the-magical-water-repelling-spray-is-812797429