So after 6 days of waiting for my bumper after selecting two day shipping, I finally got my black bumper yesterday. Here is my personal review, and is obviously IMHO... Design: First impressions, I really like the design and the grip when it's on. Unfortunately, there is noticable "looseness" on the top/bottom. What I mean by that is if you hold the bumper by the sides, you can sort of push the iphone inside either up or down to "transfer" the looseness from the top to the bottom. When it's loose on top, the sleep/wake button is very difficult to press. When it's loose on the bottom, it just feels weird, but doesn't really affect anything. I'm sure some of you have bumpers with no looseness, but from what I've read, the greater percentage seem to have loose fitting bumpers in some way (at least posted on macrumors). The external volume and slee/wake buttons look awesome as well. Usability: First the positive - it totally "cured" the signal loss issue on my iPhone 4! Unfortunately that's it...the rest is where the bumper fails (obviously in my opinion). Perhaps I'm OCD, but the loose feeling of the bumper contrasts with the very solid feeling of the iPhone 4. Also, this may just be my bumper, but when (and if) you get a bumper, BEFORE placing it on the phone, hold it in your hand and shake it. Hear that noise, like there are broken bits of plastic inside somewhere? That noise doesn't go away when the bumper is on the phone, so whenever you shake it or turn it fully, you can hear it. I can live with that noise, but it is annoying, to a degree. Besides the sleep/wake button issue I stated above, and the looseness, the only other problem I see with the bumper is that you cannot use many "Made for iPhone 3G/3G(S)" power accessories. So if you have a car charger, USB charger, or dock with a "fat" connection, odds are it might not work with the bumper. For me, I use a car mount from www.proclipusa.com/. My mount charges the phone while it's in my car while is essential for me. The other problems listed above plus it's inability to work with my car mount make the bumper a case I simply cannot use - despite its fantastic appearance. I'm not trying to disuade anyone from buying the bumper - I just want to give my $.02, so maybe someone else can save a few bucks ($34 to be exact). I know I can return it for a refund if I am not satisfied - which I will do - but I really wish some of the above problems were worked out before this product went up for sale because it really looks nice on the new iPhone. Oh well, back to my bodyglove "grip" case from ATT!