I purchased a block set of knives.  Within two weeks we noticed the rust on the knives.  I reported to the ZWILLING they were really sorry.  They told me to hand wash this prod which I did.  But I did notice right on the box it says dishwasher safe .  Many back and forth emails and the best I got was they were sorry.  It is obvious the company is producing a cheaper product and will not stand behind it.  Think twice before you buy any product from this company! Very disappointed