What a way to end not only the series, but the whole BB/BCS universe. Lots of nice callbacks to the previous seasons, such as the scene where Jimmy and Kim sharing a cig. Oh, and the cameos too.
That being said, I think that a lot of people won't get the point of the ending. Throughout this life, Jimmy has been running, not only his trouble with the law but his feelings about Chuck or guilt regarding Howard's death, all the while using scams to cover his mistakes. The Saul Goodman persona is one big coping mechanism for losing the woman he loves. When shit blew up during BB, he ran away to become Gene. Chuck had always believed that he would never change, and he was right as Gene would go back to slippin' Jimmy and eventually the more sinister Saul Goodman ways. Despite all the shitty things he has done as Saul, he has no regrets, until he heard Kim had confessed everything about Howard. He had no idea how broken Kim had become, to the point that she was willingly open herself up to get sued by Cheryl and lose everything. He finally realize if he had kept going down the Saul path, he would continue to hurt people he loves. This is why he finally confessed for real at the end and leave his Saul Goodman persona behind once and for all. If he had taken the 7 year plea deal that he had manipulated, he would just be running again and down towards the dark path that is Saul Goodman.