This episode truly was amazing. While the beginning wasn't as cool as the later scene at the news stand, it was pretty good but the one thing that really blew me away was the way it introduced several new elements while at the same time giving answers (The one I can think of being mainly the revelation of Parallel Universes coming from the answer of what ZFT is).
The conclusion with the bomb was also very cool. I really liked the bomb kind of hovering on this view of the city (Which made it all the more tense)
The ending in particular though with the revelation that Walter wrote the book really surprised me (Although quite a few people I know didn't actually understand the implication of the "y")
Other than that I can't wait to see more!