While this is a great (and powerful) smoothie maker that blasts through ingredients, it's obnoxiously loud.  You better have enough smoothie supplies out for the entire because this will wake them all up!  Seriously!  My daughter has guines pigs in her room ( opposite side of the house from the kitchen)  and they scream when I use this thing.  We've had construction crews across the street that make less noise than thing.  Great for smoothies?  Yes!  Great for hearing and sleeping?  No!  Also (as with all Ninja products)  for what you pay the recipe book is awful!