Caleb Crain at the New Yorker’s Page-Turner blog:
…leaving the theatre after “Upstream Color,” I felt reasonably confident that I understood what had happened, plotwise. “But what’s it about?” my husband asked. I felt much less sure about that, but as I thought it over in the days that followed, and as I pulled a few transcendentalist classics off the shelf, I began to wonder if I’d been watching a movie by the premier Thoreauvian of our time.
This is easily the best piece of writing on Shane Carruth’s film yet.