Unfortunately, this blender doesn’t cut frozen berries very well at all.  I tried on two occasions with the same result.  It’s not ideal to repeatedly take the lid off and move the fruit around in an effort to make a simple smoothie.  My actual food chopper is more efficient at making a smoothie than this.  Don’t be lured by the price when shopping around.  It seems that I will have to spend a bit more money on a blender that delivers.