Harry Potter and the Half-Blood Prince is an all right movie. It's very confusing if you haven't read the books, or if haven't seen the other three or four or five or six or however many movies there were that preceded this one, or if you saw them but you don't remember them. I fall in all three of those categories, and it was very confusing for me. I'm not certain of the plot except that there are some wizards and some bad guys and they are fighting each other. Some people think that Harry is the "Chosen One" but others do not--I don't really know what that means though. Voldemort makes an appearance as the child Tom Riddle. Helena Bonham Carter is evil and can fly around as a cloud of smoke, along with some other people who are dressed equally goth. There's a vanishing closet that's really just a portal to another vanishing closet. That's all I can remember about the plot.
I think this movie was really just there for the ending (where something terrible happens, but I can't reveal what or I would "spoil" the movie). Every other part of the movie is essentially just buying time until what I assume will be a final battle between Voldemort and Harry in the last movie (which will be in two parts to milk as much money out of you as they can). It's just kind of simple, mindless nothing. Some of that nothing is boring, some of it is exciting, some of it is scary, and some of it is funny; it's all equally worthless though. I'm fairly certain you could have skipped this movie and gone on to the next one if you wanted. But the movie is an entertaining one. You probably will not be disappointed if you just want to waste 2.5 hours watching something fun.IMDb link: http://www.imdb.com/title/tt0417741/