Yeah, it is actually amazing. I've been sharpening knives since I was a boy, using a whetstone, steel, etc. I've also used all sorts of specialized sharpeners, like the overrated (IMHO) "Chef's Choice" that my wife got for me twenty years ago.
Then, my future son-in-law brought over his Work Sharp, Ken Onion Edition. He has a huge knife collection, and sharpens them obsessively. I spent an evening sharpening all my kitchen knives, and the difference was not subtle at all: every knife had a substantially better edge than it had when new, and cutting was suddenly a completely different experience.
I am totally blown away by this tool and cannot recommend it enough. The only downside is that, like many tools, it does have a learning curve, but there are dozens of YouTube videos that will help you figure it out. In my case, I had my son-in-law-to-be.
