Replaced our old Twinstar knives and these Pro Knives and they are fantastic.  Heavier blade profile and holds a really nice edge.  We actually replaced with an entire set, and so far they are all working really nicely.  I expect these knives to be easier to sharpen because of the blade profile, but have not had to put a new edge on any yet.  I would recommend these knives. [This review was collected as part of a promotion.]