I just got my copy of this lens from Amazon USA a week ago, with a US warranty, and so far it meets expectations in terms of speed and sharpness.
However, it is not white, but rather a sort of mlitary brown/grey color. And it is not all-metal, as others have posted. In particular, the section next to the mount is a plastic - you can see the molding seams.
It still has the red ring, though.