This company does not stand behind its products. I purchased a new motor base for the professional set less than 6 months ago. It works with the blender cups but does not work with the blender pitcher or food processing bowl. Ninja says it is my fault because i purchased the new base thru their website instead of calling them! Now they want me to buy new pitchers and bowl. They should not sell the base separately if they can't guarantee compatibility. Buy another brand.