To me its a prolouge, to the main event The Original Trilogy - Lukes Story, as I find the other two official chapters of Anakins story not very interesing and boring so I cant be bothered to see the "so called" proper way to see all of Anakins Story again,
Its a shame the other two were not as good and interesting as Sith (IMO), Anakins story may have been worth sitting through,but another problem is (the inconsistancies (for me personally) help ruin the effect for me any way so watching 3 4 5 6 cuts them down...