This series is still one of my favorites. It had its ups and downs, but overall it was a series about hope and life. It's the purest story about life I've found to date, and so incredibly optimistic. It really does make you step back and think about how trivial some of our problems are in the grand scope of things. Overall, the ending is pretty satisfying to me.
Also, the ending is infinitely better than the mess that Destroy and Revolution devolved into. This one managed to keep true to its themes without going all weird and wonky, so it's got that going for it.