Clockwork Orange

I saw Clockwork Orange (Kubrick, 1971) a couple of weeks ago...
I was overwhelmed to say the least. Very intriguing.

If you saw the movie too, would you share some opinions/thoughts/whatever?
Please keep to the movie as I haven't read the book but heard it's quite different from the movie.

And... did anyone else think there was some resemblance to Spike? Head tilt etc?