Quatermass wrote:
The novel is way better. Kubrick sexed it up too much with the naked statues and the phallic sculpture Alex brains the cat woman with. In the novel, he uses a bust of Beethoven. And that crappy synth music backing (whenever there isn't a classical piece of music). Not to mention Kubrick's refusal to put in the original ending of the novel (which he was apparently aware of, but didn't put in).
Actually, I think both the movie and the novel have merit.
The novel is scarier in a lot of ways - particularly because of the ending - and the reader's eventual understanding that they too have been brainwashed. It's a bit like Hanke's "Funny Games" in that respect.
The movie is different altogether - not wrong, not better or worse, just different.
Kubrick has a long-standing tradition of putting his own interpretation on things - eg: the way he took most of the supernatural elements out of the shining and made it a mental movie instead. Not better - and not necessarily worse, just different.