I was very satisfied with the way it ended. I thought it was great that the flash-sideways, which I initially found inconsequential to the main storyline, allowed all the characters to get closure. I was in tears every time they realized what happened to them on the island. It was a nice touch that this sideways world was "purgatory" when so many theories in the past speculated that the island was purgatory. And the last scene were Jack closes his eye in dead was a nice bookend to the way the series began. This show will forever be at the top of my list of greatest TV shows of all time. LOST will be missed but never forgotten, I'll recuperate cause I'm so drained after that finale and watch the entire series from the beginning around the time the final season comes out on blu-ray.