The first one I received worked great at first, but then it wouldn't charge anymore. It would give an error when the phone was attached to it and trying to charge and when I removed the phone, the usual light didn't show so it wasn't charging. I contacted customer service and even though it went past the return period, they were happy and willing to send me a new one, but the second one broke as well within the month. I'm disappointed as this was a really convenient way for me to charge my phone while on the go. Since I always forget to charge my phone it was convenient for me to have this backup battery case. Now I'm debating on if I should contact customer service again to see if I can get a third replacement. I don't want to go through the trouble of trying again and getting disappointed again.
This case takes ALL day to charge and will not fully charge the iPhone. This case you can't charge the phone and case at the same time either. I thought I was getting a deal with this case and in result I have to now purchase a different case. I am very disappointed in the quality of this case.
For the price, it's not bad. The only problem I had with this case was after about 3 months, the plug to charge would no longer work when the phone was in the case. I could charge the case on its own, but not with the phone. So now I have to charge them separately. The phone doesn't easily fit into the case without a few tries. Otherwise, I can't complain since the case still charges my phone to 100% when needed.
I like the case because it performs it's purpose. However I get kind of irritated with it. For instance, sometimes when I connect a charger to the case, while the phone is in it's case, the battery case will charge, but the phone itself won't charge unless I hit the charge on/off button. Other than that, it does preserve you're battery life, and is a nice looking case. Wish they had prettier designs to choose from however.