Although this movie does not provide as many turning points in the Potter saga, it does provide a chance for the characters to really grow. The actors are truly comfortable with each other, themselves, and the art form which is very refreshing on screen.
You will find yourself confused if you have not read the books as just seeing the previous movies will not suffice. None the less, just because you have not read the books does not mean you will not enjoy the movie, it just means you will need to research yourself a little to keep up under stories of the plot. These movies keep getting better and better and although its a long one you will be enthralled the entire way through! Highly recommended.