It is so much quieter than my old blender.  It makes great, perfect sized smoothies.  I purchased this Ninja Blender to replace three appliances - my 20 year old blender/food processor, a smoothie maker and a juicer.  I have had the new Ninja for only a week so I have not had an opportunity to put it to the test on blending and juicing, but it makes great smoothies.  Love it.