Some of the comments complain that the film is biased for the pro-immigrant side. I think the reaction from those commentators show that the film brings out emotions of all sides, and thus it is a successful documentary for discussion.
I personally know that this documentary was shown by an extreme anti-immigration group in Massachusetts as an educational piece for their group. I showed this documentary to my very much pro-immigrant community of friends and colleagues.
The success of the film (or failure, if you prefer) lies in the fact that both sides do respond to it strongly. Perhaps it reveals that America remains a polarized society, and that we are letting the extremists grab the mike rather than discussing the issue and identifying a pragmatic solution. The opportunism for anger is rampant, particularly on the anti-immigrant side.
I recommend this movie, and hope that viewers realize that division and extremism will not accomplish real solutions...only harden untenable positions.