I guess I liked this episode because it told so much about the storyline that I missed. Since I've only seen the show one other time before, this explained everything for me in one fellow swoop. I wasn't disappointed. This episode made me want to come back and watch more. It described the sitation very well, showed character personality, and left multiple examples. In other words, it shouted at me, "Watch more of this show! It's very cool!" And I think I will.
I like how it gradually explained more and more about Vash, not rushing into it like a lot of other shows would. That really gave me a better understanding of him.