I must confess I'm not a big fan of these type of movies, but since Mira Sorvino was in it, and John Sayles and Steven Soderburgh both worked on the script, I thought I'd give it a shot. This was actually pretty good, because they paid attention to the science without becoming clinical about it, and it was more interesting and credible than I expected (then again, science was never my subject). The second half of the movie is pretty much a chase movie, but that's well done for the most part, though Charles S. Dutton wears out his welcome pretty quickly in a thankless role. Sorvino is as good as I expected.