The Half Blood Prince was more like 3.5 stars. Four is a little generous. Given that I had read the book long before the release of the movie, I thought it did a fair job of jostling my memories of this portion of the Potter series. Overall, the acting was on par with the style and ability presented in the earlier films. Having heard that the remaining installment shall be broken into two movies, I find that the Half Blood Prince could have been condensed and added to the first of the remaining two films. The plotline is interesting, but drawn out. It worked better in the book than on screen. At any rate, this film was pretty good overall, and I would still recommend it to people but I think I could have waited for the DVD.