The attachment works as advertised, however, it is noisy. Also, be very sure you have the attachment securely attached. I thought I did, only to discover the vibrations caused the entire device to fly off the mixer. 
I love the sifter feature which has made a huge difference in my baking. Don’t use the scale much and would like to be able to use the hopper and sifter without the scale. [This review was collected as part of a promotion.]