I watched the first episode of Chuck as well and while I enjoyed it for the most part, there were a couple of issues I see with it. One, I'm having a bit of trouble with the whole suspension of disbelief thing, and secondly, I can't get past the fact that they tried to find basically the twin of Jim from the Office. Chuck is just waaaaay to similar to Jim for me, to the point where it gets distracting. Not just the look but the way the guy talks and some of his mannerisms.

But so far, it has been the most entertaining of the new shows.