If you are in two minds, buy it!
I know when I am buying DVDs, somethimes I wonder wheather they will be as good as I expect. Well this one is better! I know that I read cumtomer comments before I buy anything, so I am going to pursuade you to buy it aswell! If you don't you don't know what you are missing! I think that Part 3, is the best and will leave you longing for the next series!