My initial thought after seeing the pictures was WTF were Apple thinking, but once you think about it and realise the design constraints due to Mophie's patents it kind of makes sense.
I was in on of the Apple stores this afternoon and asked if I could have a play with one.
First of all, it looks way better in person than they do in the pics.
Apparently the one reason for not doing a full back is that Mophie have some kind of patent preventing a battery spanning the full length.
It actually works quite well though, it enables it to look and feel much less bulky than the other battery cases. My dad and sister both have the Mophie and it feels incredibly chunky to me. This feels so much better in the hand and doesn't
seem anywhere near as chunky due to the majority of the case being normal case size and thickness.
I'm sure weight was also a factor, it's pretty heafty at it's current size, research might have shown it was uncomfortably heavy if the battery spanned the entire back.
The hump is pretty good for grip.
It's got some good things going for it too:
*Getting it in and out is incredibly easy, so much better than any of the other battery cases I've used which means you could quite easily keep the case as backup in your backpack if out an about to use only in an emergency if you really don't want it on all the time.
*It's the only case (I think) that uses a lighting connector, which is a must for me. This means I can use it with all the docks that I've spent a chunk of change investing in.
It doesn't have the on/off switch like a lot of others, but I imagine it could potentially be something they could implement as a software toggle in the future. TBH I'm not fussed about that though.
I walked into the store thinking this was one of the worst designed pieces of kit I've ever seen Apple release....I walked out with one on my phone
Figured I'd give it a test run for a week and see how I get along, so far it actually seems like a pretty decent piece of kit. The white on white looks really good too.
I can imagine it being very popular with people who like to game on their phones frequently or use the camera, video, GPS etc. a lot.