I say it's eye candy except for the very end. That's a nice explanation of the lightsaber twirl, but that wasn't my main problem with it. For me, it just seemed like the lava overshadowed the characters. The first time I saw it, that duel was the only part where I just blanked out and couldn't help not paying attention. It was hard for me to pay attention the second time as well. Yes, I knew it had been planned as a lava/volcano duel for years (one of the few details that has a long-standing precedent attached to it), but there was simply too much. I couldn't concentrate on the characters there was so much of it, and this was a duel that I felt really should have been more character-driven rather than effects-driven. That is why the duel in Empire is my favorite. It is a huge step-up from the Ben/Vader fight. It is much more rugged and intense, and the focus stays on the characters. And the part where they are on the hover-droids inches from the lava is just ridiculous in my opinion. There is no way they could be that close to the lava and not get burnt by at least some of the particles flying by, especially when Vader gets burnt up by it just a few minutes later. That was where I was convinced it had gone too far. But once they stopped fighting and started talking, that's when it brought me back, and I began to appreciate it.