I watched it via Crackle.
NYMag.com concludes the film "makes its social and political collisions resonate in our heads so as to leave them ringing. It’s a film you won’t stop thinking about, arguing over, debating, after the lights come up." Spirituality and Practice says, "Crash is a crash course in unmasking the racial and class divisions in American society that make all strangers into potential enemies."
Rolling Stone opens a positive review with this: "Racism collides with its targets during one thirty-six-hour period in Los Angeles. Alive with bracing human drama and blistering wit, the film benefits from the strong directing debut of Paul Haggis". Slant Magazine gives it 3 out of 4 stars.
Entertainment Weekly begins its review by saying, "The stunning, must-see drama Crash is proof that words have not lost the ability to shock in our anesthetized society." Salon calls it a "throwback message movie".
Roger Ebert gives it 4 out of 4 stars, says it deserved the best picture award, and says it
is a movie of intense fascination; we understand quickly enough who the characters are and what their lives are like, but we have no idea how they will behave, because so much depends on accident. Most movies enact rituals; we know the form and watch for variations. "Crash" is a movie with free will, and anything can happen. Because we care about the characters, the movie is uncanny in its ability to rope us in and get us involved. ... One thing that happens, again and again, is that peoples' assumptions prevent them from seeing the actual person standing before them.Rotten Tomatoes has a 75% critics score and an 88% audience rating.