Actually it was very good and exciting episode. Talked about John Lock's life in the far past which was some thing missing for lock's Flashes.
Also it showed very surprising connections between the characters ( Richard & John ) , ( Matthew Abdon & John ). LOST is going to be more mystique towards some characters. I think that the writers should concentrate about some characters who weren't explained to us , Like : Richard , Daniel , Matthew Abdon , Penny , Charles Widmore and More ... I think that will make LOST more exciting and have more plot.
The final part of this episode was very exciting. Finally we knew some things about Jacob And what happened to Claire.