It's ok I guess. I have to agree with Jordy, it does actually look like a roller coaster. I don't think someone like Anish Kapoor should have been asked to do anything like this. There in my opinion would have been several other people who could have done a much better job. Someone like Norman Foster who is responsible for some of the more modern and instantly recognisable buildings in London (i.e. The Gherkin, Wembley Stadium, HSCB Tower (Docklands), Millennium Bridge, London Town Hall).
Adding to what Dan said, the Skylon in London in my opinion is one serious ugly building now. This will end up being the same in years to come. They've already said that after the games they might demolish the whole site as it will be too costly to keep up so why the need for such stuff like this?

