Cost $$
They sell it with a complete kit, not sure the cost. I know they sell the for less when you purchase a Miele. I will probably bite the bullet eventually and let you know if it works well under load. It would be very nice for high ceilings, ceiling fans and ledges. Miele really should sell an attachment kit worth using, the ones that come with the S8 are an embarrassment for a $900 vacuum.
I wish I would have found these guys prior to purchasing from a local dealer, I would have saved the taxes and they are really friendly on the phone.