I recently got the Juice Pack Air for both my wife and I (we have the 3gs). After almost 2 weeks, we have absolutely no complaints. The fit and finish is great. I have a BSE on my phone and while the fit is snug, I was able to get the Juice Pack on with a bit of pushing. It does add a bit of heft but I actually like this. My phone feels solid and substantial. As a case the Juice Pack Air works fine. It protects the iphone as well as any other case though because of the space on the bottom for the speakers I imagine dirt would get in and maybe scratch the phone. For this reason, I have the BSE on. The extra power comes in very handy. Now we can use our phones as much as we like instead of rationing our usage in order to conserve the battery. Overall, I would recommend this product. BTW, I guess my only complaint is that it is a bit slick so I need to be careful not to drop it.