I think the DC41
may be a little over engineered. It seems like everything is kept inside the ball; the suction hoses, filters, and so on. If something were to get caught in it, such as a sock, it appears that it would be a time consuming process to didassemble the ball and clear out the blockage. I would love to buy one and play with it and test it around my house, but $600 is too much for me right now! Hopefully someone here will purchase one and share pictures!
Floyd