I'll start off with the disappointing:
-Badly executed death for Mr. Nakamura. I didn't want him to die and the way he died was a bit quick and awkward. George Takei is too awesome for that.
-Kensai was a freaking asshole British guy.
Still, I thought it was a pretty good premiere but nothing spectacular. I liked the new Honduras heroes and think that they will somewhat replace Micah and Nicky(not that they won't appear every 2-3 episodes). I think that she spreads some sort of virus, poison, or disease and possibly when her brother is gone or when she is distressed, it activates.
With the Hiro/Kensai story, I really don't like who Kensai is and I hope Hiro takes things into his own hands and steals the sword, effectively making himself Kensai. I also slightly dislike how unrealistically they display the past, but it doesn't overly bother me.
I'm enjoying Claire and Mr. Bennet in California but I find this new love interest for Claire to be exactly like the friend she had in Odessa, except he flies. Is it a coincidence he has identical powers to Nathan? I guess we'll just have to wait and see. Maybe the writers are running out of powers(doubt it though).
I'm slightly skeptical about if it was a great idea to make Peter have amnesia but I bet the writers have something good planned. As for the Mohinder/Bennet attempt at infiltrating the company, I have only praise for that story-line. It was one of the more suspenseful and interesting parts of the episode.
Anyways, I'm just happy that the second season of what in my mind is the best show in years has begun.