That episode was a Star Wars trip-fest, but then again, it was a rather cool show. It did a few things namely for the development of Anakin and Obi Wan's characters that were never quite explored in the prequals and which were very much needed...
1) It sort of tied things up between Obi Wan and Qui Gon with regards to Anakin's training and possible future. I loved how Obi Wan sort of had the chance to "vent" to Qui Gon's Force Ghost about how he had trained Anakin as best he could, but that the boy still remained passionate and impulsive. A scene like that would have been perfect in Episode II or III, but alas...
2) The episode sort of gave a chance to see Anakin greive and reflect on the guilt he feels for the loss of his mother in a way that was not really done outside of Episode II, but which ultimately defines his transformation into Vader. I like how the creature (in the form of his mother) cautioned him not to let his guilt define him and then warned him that his love for Padme, etc is actually a prison...
3) It explored the significance of Anakin being the "chosen one" and what that possibly meant in regards to keeping balance to the Force. It was for the greater good of the universe that Anakin stayed at that place to maintain the ballance between light and dark and notice how at the end of the episode, Anakin selfishly gave it up and left...
Just my thoughts. I rather enjoyed it
