What are the strengths and weaknesses of the behaviourists approach to psychology?

Strenghts of the behaviourists approach are that it has had a major influence on psychology, it is very scientific, its easily testable, it is able to explain individual differences, explains behaviour using simple principles and it has many practical applications. Weaknesses are that it ignores conciousness, subjective experience and emtotions, it is reductionist, it denies the role of innate factors and that its deterministic.