I thought it was alright. Better than anything Season 2 managed to come up with, but then, Ben punching a dinosaur is more compelling than anything Season 2 managed to come up with, so maybe we shouldn't use that as a yardstick by which to measure this one.
But I digress. There were a lot of things to like here, and a lot of things to hate. It had all the typical logical inconsistencies that we'd expect from Heroes, most of which will probably be explained away with "Butter Effect!!!11" Still, Sylar vs. Claire was good, even though there's absolutely no reason that fight needed to last longer than about two seconds (as Claire herself later says, healing isn't exactly what you would call an offensive power).
Also, I am displeased that Bob is dead, because really, he was the only real hint we got of how awesome a season actually devoted to understanding the previous generation could have - and should have - been. Instead, he's featured prominently in an awful season, and then dispensed of as quickly as possible at the beginning of the next. I guess I'm taking my anger at the complete and utter failure of any kind of compelling storyline for the previous generation out on Bob, but seriously ... it's an awesome idea, why in the world do you kill off all of them? I mean, that red-headed chick from the end of 2 is more interesting by her own self than Maya, Alejandro, West, Monica, and Mohinder combined.
Also, I'm not sure what to think of Mohinder getting powers. It should be interesting to see where they take it, but unless there's a serious side-effect, as in, you know, death, this show may have reached it's jump the shark moment. If anyone can have powers, how long until everyone does? I guess I should be happy, though. Mohinder should at least be passably interesting now.
Finally, I don't know what to think of the final revelation. Hell, I don't know what to think about anything they're doing with Sylar: he ends season two saying, "I'm back," and he's back for exactly two episodes when he's recruited by the good guys. Frankly, Sylar teaming up with anyone makes zero sense, so unless this is just a means to an end (kill all the badguys and steal their powers, and as an added bonus not have to worry about the Company hunting him down, which I think is probably the direction they'll take it), it's completely out of character.
As you can see, most of my negative opinions have to do with possible directions they'll take the show. If they manage to find a way to make all of these plots work, then more power to them. But with everyone all over the place and so many things going on at once, I have to wonder if they'll be able to pull it together, or if this is just gonna end up like season 2 all over again