Superb!
"This pull-through sharpener really worked on my three month old Wüsthof knives. Just a few strokes through the ceramic notch and the knife is again keen. Tech details from Wüsthof (by email to me; not on website) "The coarse stage of the Ikon 2-stage pull-through sharpener sharpens to approximately 34°, while the fine stage sharpens to approximately 36°"."