Matt Damon does a great job at this quirky character. I say this from the perspective of not knowing this character. Maybe friends and relatives will say that's not like Mark Whitacre at all. Anyway, like all 'true stories' it pays not to know anything about the facts beforehand. Much more enjoyable that way

Where the movie might fall down a little is that it seems rather light. Maybe because the story in part is a comedy of errors. Also, although it's set in the early to mid 90's, they seemed hell bent on making it seem like the 70's. Even down to the fonts used and the musical score. The opening scene showed a close up of someone loading up a miniature reel to reel tape recorder. I was thinking " I thought this was set in the 90's? Musta been a typo!" I was only a week or so in the US in the mid 90's. It didn't seem THAT backward to me

I guess heading it in a 70's direction gave it a more comic look and feel but what 90's set film is complete without 'happy pants'?
There were no other big names that i could recognise. Clancy Brown has a small part. Quite a few 'hey, it's that guy' actors. I loved the long suffering FBI agent, Brian Shepard, played by Scott Bakula
I give it 4/5.
Edit: forgot to mention the premise! It's a movie about a corporate whistle-blower. Biggest price fixing scandal of it's time. Damon plays a bio-chemist who gets caught up in the business side of things...