robin if you get heavier one dont sell the sebo, good on "clean" carpets where no need heavy aggitation
as guys above said, the crap that crb lifts can not be lifted by rotary, somethines you dont see hairs and when you finish the carpet and comes to brushes cleaning you realize whats under machine, just show it to customer and she will call you more often
somethimes i even use white brushes on wool if its realy destroyed, huge different, on these kind of carpet you dont care about extra pulled fibres.
another story, it saves you loads of money on spotters as much more stains dissapears after heavy crb what cant after sebo.
and its worth this money as should last longer then 3 sebos, brushes last easy 2-3 years and more.