I really don't understand the hate for screen protectors. I got my official bumper last night and I've been rocking only the Steinheil ultra crystal front/back protectors on mine since December. Once the next big thing comes out, I take the screen protectors off and sell a mint-condition phone to the highest bidder. Why take chances with scratches on these things?
For those asking about the stock bumper, I think it's perfect and I usually keep my phones naked. It's very well made, fits the phone perfectly, and provides better feel to the buttons (imo). My power button was starting to get a little more clicky, but the bumper resolved that. I think it's been said before, but it does feel a little slipperier initially, but it's fine once you get used to the new feel. It also resolves the muted speaker when setting the phone on a flat surface.