I rented it and, although I liked it, I didn't love it. It never got to the realm of great, but I found the goings on in the hospital and the psychological state of the people involved to be pretty engrossing. The movie just flew by for me because the plot was smart, it looked fantastic, and everything ended up with a pretty good payoff in the end. I was expecting just a killer virus movie, but it was much, much more. I am glad I checked this one out.