Why do you love PhysX? Have you actually used it?

Most programmers I know who have to work with it are very suprised. PhysX has a multi million dollar budget yet it is worse than Newton or Bullet in many regards. Most of the money must go into marketing. :p

For example Newton's custom joint feature is awesome and PhysX has nothing comparable. Newton's whole API is a lot nicer and straight forward than the PhysX one.