There is a reason the movie is called "Melancholia". There is also a reason why Kirsten Dunst mood changes. If you are paying attention there won't really be a surprise towards the end. Only surprise being that the characters themselves didn't think of it. And don't watch it, just for the "flesh".
Kirsten Dunst delivers a power house performance. And the other actors are good too. I was still missing something. I liked the movie (and I can tell you there weren't that many in the cinema I watched it, who actually liked it) and I could see the allegories and everything Lars v. Trier was trying to convey. Still thought the break (it's kind of like watching two different movies back to back) didn't really work that well in my opinion. Some of course will just like it, because it's different. That's OK too, just be sure to know what you let yourself into.
Kirsten Dunst delivers a power house performance. And the other actors are good too. I was still missing something. I liked the movie (and I can tell you there weren't that many in the cinema I watched it, who actually liked it) and I could see the allegories and everything Lars v. Trier was trying to convey. Still thought the break (it's kind of like watching two different movies back to back) didn't really work that well in my opinion. Some of course will just like it, because it's different. That's OK too, just be sure to know what you let yourself into.