Four stars. Recommended.
So many action films these days are action comedies, and so many of the current glut of remakes tip knowing winks to the audience, that it came as a little bit of a surprise to find no humour whatsoever in Miami Vice. No shared jokes, no snappy retorts, no witty one-liners as the heroes casually blow away the bad guys. In fact, there's not even any casualness. This is a very deliberate and very intense movie.
My two main criticisms are that the sound was muddy and unclear--I had a hard time following some of the dialogue--and that it peaked too early. The hostage scene at the trailer park felt like the climax to me, rather than the big confrontation that followed it. I still recommend it without hesitation, though.