I liked the episode, too. I had my money on Isaac being the one to die, but I didn't really like Persuado Girl (her power was cool, but she's an awful actress), so I'm fine with what happened. And I like how the Haitian is actually a character now, and it's cool that he's helping Claire.
Peter and Matt experiencing feedback when they were in the room together was nice. And I guess Peter is starting to be able to access powers he's absorbed after the fact, right? I think that he was using either Isaac's powers of clairvoyance, or Hiro's power of time travel/teleportation when he passed out.
So with Sylar: he was just choosing not to use powers until the end? Why did HRG think he couldn't? And I guess we already knew he could his powers when he visited Peter (assuming he actually did visit Peter...)
something funny i noticed, and i hope this doesn't offend anyone: isn't it so transparent how the writers are referring to the Haitian as "the Haitian," when you KNOW they're just saying that because they can't say "Holy crap, the black dude!!".... or, dare I say, the n word??