Yes, I know they are an expensive set of knives. However, you pay for what you get and when you purchase these you get a quality set of knives and a built-in sharpener as well. 
I have other knives but since we bought these I only reach for my Ninja knives for all of my food prep and more.
We even recommended them to a family friend from whom I purchased her Ninja cookware set and she loves them too.
Ninja need I say more?