Took about 6 or 7 hours here which isn't bad considering the length of games released theses days tend to be 10-15 hours but cost 3 times as much.It took me about 7 hours to get through completely and to see almost everything.
I did find it became quite hectic as well with the blocking+using items+attacking although it only really showed on the final encounter.* Combats are something like "semi turnbased" comparable to what you got eg in Final Fantasy VII and VIII. The problem with this is, that it sometimes gets rather hectical and it is really problematic to use the items in a perfect fashion.
Adventure games tend to be quite linear, but yeah I would have liked a bit of choice...* The game is completely linear. Where you think you got some choice of what to do, about two minutes later you realize that you have to take the other way...
I saw that as a plus as I don't think they would have been able to find anyone that could voice act Tycho and Gabe in a way that would please all the fans.* Most dialogs are "read only". Only the narrator has voice over.
They really did capture the spirit of the comic in the game which is awesome.So in short: if you like the humor of penny arcade (really great comics!)