I guess the real test is how long this thing lasts - but everything I've read so far indicates that is a non-issue for the Mugen product.Battery arrived within a reasonable time frame.Went through the recommended break-in procedure and now, instead of my phone running dry before 1800, I've got something like 60 or 70% left.Mugen earned a little extra credit today when they finally responded to my support request about broken hooks in the replacement back.They say "No problem, just send us the order number and we'll send another back". Beats paying fifteen bucks for one.I probably broke this thing myself, although did not do anything unusual, having removed/replace the stock cover dozens upon dozens if not hundreds of times with no problems.My guess is that there is a trick to attaching the cover and/or Mugen has a batch of covers made out of bad plastic.Hey, stuff happens.... one big test is what the vendor does when it happens.IMHO, Mugen passed the test - albeit they could have responded a few days sooner.I would have given it five stars if it included instructions on the proper way to remove/install the special back.The battery is what you expect, but it confuses the phone since the normal one has a different charge.In all i recommend the product!I have ordered this battery for my Galaxy Note (International Edition)It doubles the size of the phone but also the capacity. It lasts about 30 hours ov average usage.The built of the case is 4/5. You may find it a little bit bulky and heavy but you can get over in a day or two.So far I super love it :DHere is the video review about how it looks . [...]Great, long lasting battery! While this battery does add quite a bit of bulk to my phone, I added the Hyperion HoneyComb TPU case,