I bought this blender to replace a smaller nutribullet blender with the hopes that it would be easier and more efficient to use. It worked ok for a couple of months and then started getting louder and less efficient. The connection between the motor wheel and the bottom of the blade slips and makes a strained high pitched noise and doesn't spin with enough force to blend my smoothie contents. I bought additional blades, but a new blade does not fix this issue/design disfunction.