To anyone who has had some experience with either or both I picked myself up a JPP bc Mophie is a reputable company and I need to extra juice and like the idea of their dock and basically never having to plug in all day. I was able to get two silver Heliums at a good price - maybe for brother/wife/whoever. Does anyone have any prolonged experience with either of these and could comment on how they hold up over time? I know the battery will degrade - any battery would - but, how does the case itself hold up to wear and tear? Any other thoughts/comments are welcomed also (do you think it was worth it?, etc) Thanks!