I love it! It's smaller than my original case while only about an inch longer the phone (bottom). It's also easier to take off, as it has a clip-on style. It's nice being able to charge my phone battery and case battery at the same time as well. I work in an environment that puts a lot of strain on my battery. It's often searching for wireless networks or cell service. It's very comforting knowing I essentially have 2 battery lives with me instead of one. Hopefully I will no longer need to carry around my charger. A simple push of a button lets you see the status of the charged status of the mophie. 4 LED lights quickly give you an idea of how much "juice" is left. A ball park idea here is neither here nor there as I care much more about having a more precise estimate of how much life is left in the iPhone 5 battery anyways. Gave a 9, would have given a 10 if you didn't need an attachment for your headphones, but I'll gladly take that in order to have 2 battery packs with no extra bulk.