As this is the 5th movie in the Harry Potter series, I've come to expect that each director has their own idea of how to present this story. I held my breath through a lot of the scenes, sitting on the edge of my seat.
The dark scenes present a well-intended menace. You could smell the fear.
Daniel Radcliffe is expanding Harry without going over the top. Professor Slughorn was beautifully played by Jim Broadbent. But I have to say Frank Dillon, teenaged Tom Riddle was hugely impressive.
I plan on see Harry Potter and the Half-Blood Prince at least a couple more times in the theater because there's so much going on, I honestly am afraid I missed something!