I had this case for over 3 weeks now, after exchanging my Mophie. My impressions:
Pros:
- Doubles the battery life of my iPhone.
- Covers my entire iPhone as opposed to the Mophie which covers it only half way. Looks and feels tough enough to protect my iPhone from a drop.
- For those worried about scratching the metal bezel of the iPhone, worry not! This case does not touch the bezel at all!!! You got to try it to believe it.
- The case texture is comfortable to the touch. I have sweaty hands and this absolutely stops my sweating the moment I hold it. Highly recommended for people with the same condition as me.
- Fits snuggly and does not wobble.
- Added thickness equals added grip and comfort.
Cons:
- It does not last as long as the Mophie. Mophie happens to have a higher capacity battery.
- 5th battery indicator goes off after full charge and using your iPhone for a few seconds. They might as well have not added it.
- IMPORTANT: Reception is affected. Usually can make calls in elevators, underground mall food courts but with this on, I am now unable to.

- IMPORTANT: Mic reception is somewhat affected. I sometimes have to repeat what I said with this thing on.
- Hole for the iPhone camera not exactly centered to the camera. It doesn't block the camera though.
- Doubles the thickness of my iPhone. For those who like to carry theirs in pant pockets, this is not for you. But then again, I don't carry my iPhone in my pocket...did you know that this promotes dust inside the screen?...don't tell me I didn't warn you.

- Synching iPhone with this on is a hit and miss affair. I end up removing it to sync my iPhone. I don't believe this is fixable by any kind of update and it's annoying as heck.
Would I go back to the Mophie? Well, if they redesign the case to cover the entire iPhone, then I will. At this time, I am willing to sacrifice capacity over cosmetic and the added extra protection of the Slider.
I hope this helps with your decission.