I listen and tend to agree with a large swathes of what he says, though not everything.

I've yet to come across a reason to doubt his credibility, but I'd be interested in reading a counter point to his arguments if you have some sources.

Chomsky is just one man, and thus subject to the same intellectual failings as other individuals, but his integrity is well beyond the vast majority of people with a pulpit. You should definitely read and consider what he has to say, because otherwise you may be hearing only lobbyists' perspectives.

I find his perspective really refreshing. Most articles that I encounter nowadays are very US-centric, or Europe-centric. They look at the consequences for a certain country or group within it, not the world at large, and are thus very polarized. Chomsky's reasoning feels truly international. And his comments about IP and medicine are appropriate as ever with the ACTA treaty (and sons) being pushed on us all by the US.

I wish there were more people with a clear vision such as his. It could make the world as a whole a better place.