How good is the obagi cleanser?

When my friend told me about the name obagi cleanser I assumed it was a Japanese brand. Anyway tell me what this brand is all about and how would you rate it in comparison to other brands. What are the other products available by obagi? What are the ingredients in their products? How long has this brand been in the market? I believe the obagi rosaclear gentle cleanser is supposed to be very good. Would one get this product for all skin types?