I don't know if anyone cares now, but, I just received mine in white after reading horror stories about Apple's bumper not being a snug fit and scratching the antenna band (not to mention the white bumper discoloring on the rubber parts. I definitely want the white to go along with my white iPhone).
Once on, the SGP is a great fit and, overall, it looks okay from the sides, however looking from the front and back leaves much to be desired. I prefer Apple's matte gray "rubber" border to SGP's white shiny rubber/ silicone one. It just looks and feels cheap. Shiny white rubber is pretty tacky- not sure what they were thinking. They went halfway with the gray buttons, so why not complete it with a matte gray border?
I have less of a problem with SGP's white polycarbonate band, overall, but even then, there is a difference in appearance. It looks more "watery" than Apple's polycarbonate and feels more slippery, plasticy, and cheaper. I also wish that the gray buttons were a lighter gray more reminiscent of "Apple gray".
Overall, I would score its appearance a 6 and build quality a 9- which is a shame because I was really hoping I could get over the "it's not the Apple bumper" factor, but for something I stare at hours per day, I have decided to purchase an Apple bumper from Ebay and see which I like best.
Unfortunately, the Apple bumper I bought on Ebay is the 1st type (pre-Verizon) and users seem to have more trouble with it being loose and scratching than the revised version currently sold by Apple. It was only $22 versus Apple's $35 on its website for the revised bumper, so I am giving it a go. It should arrive this weekend or Monday and I can update here if people show interest.
I'm thinking of lining the inside of the bumper, or the iPhone's antenna band itself, with strips of electrical tape to provide a tighter fit and avoid scratching. I may also use a hairdryer on the bumper as I have read here that it helps give a tighter fit. Some people even mentioned BOILING the bumper. Yeah... not going that far! If it's still loose after the tape I will live with the SGP because it's not a bad bumper- just not visually appealing to me.