I was reluctant to purchase a block set that had a self sharpening option, but decided to give it a try. Grew up with Henckels knives so I was a little less leary because I know they are a leading German knife manufacturer.
So happy with this purchase.  The knives are well made, feel great and are so easy to sharpen.  All I do is pull the knife through the slot when it needs to be sharpened.  After passing the knife several times, its just as sharp as straight out of the box.  Great concept.