More than I expected

Everyone knows not to expect much from sequels, and I didn't when I was watching this one, but I was pleasantly surprised. It was very entertaining between the special effects, music, and actors. It didn't hurt that Kiera Knightley was in it, that's for sure. The plot wasn't as good as the first one of course, but it leads into the third movie nicely. What the plot the lacked, the acting and the cinematography during the action scenes made up for. Is it worth buying? Compared to all the junk movies out there, it's practically a must.