I have seen these blades before at a heavy equipment show, our department would never buy those, to pricy for them, but they would last a lot longer then the old style straight blades for sure, I like the picture charts of the road way good guide, but keep in mind not all roads are the same or have the material on them like shown in the picture's, sometimes you have to find and recover material and then you have to deal with rocks and sod, learning how manage that and put a crown in and leave a smooth road with good drainage will separate the men from the boy's.