 We present these theories as operating on two levels. On Level 1, they tell us about the nature of experience. With the exception of adverbialism (for reasons that will emerge shortly), this can be investigated by considering the stance of each theory on the nature of the objects of experience, and the structure of our experience of objects. On Level 2, they tell us how what is said at the first level bears on the explanation of the character of experience. We also consider how each theory addresses the common kind question.