It does work and it is super cool from any videos or info I watched on it. Because metal is flexible, the size, length, thickness, and weight of the blade all gave to be taken into account in order to get a vibrating frequency that works. If you ever watch videos of this or ones like it (this is the only good working home use kitchen knife I know if) it’s pretty bad ass, if for nothing else than just for how anti stick it is. I’m still not willing to pay like $400 for it. I’m a big knife sharpening and cooking guy, but I don’t think I’ve paid over about $50 for any of my kitchen knives or over $230 for a pocket knife. Now if I ever wound up seeing one of the Seattle ultrasonics somewhere new or used and still looking good for under $200 I’d probably break down and buy it. Blade stick is pretty annoying when you want to cut something very consistently and not spend a bunch of time to do it.