I've had an earlier model many years ago and it's still working like a champ. This model is definitely an upgrade with the plastic side glide plates that control the angle of the sharpening as you pass the knife through them (of which is key for a sharp knife). I noticed the diamond grinding wheels #1 and #2 as well as, the honing wheel are all slightly larger of which I think is great. Makes quick work of getting virtually any knife large or small back into shape with a few strokes. I love it and highly recommend it.
I have many sharpening tools some costing in the hundreds, one kit slightly over $1,500 but is definitely made for the home user and a great outcome.
As a side note: Adding a leather strop with diamond paste is A MUST. This will take you knifes to the next level by removing all of the microscopic burrs... trust me on this.
I found this product to work, marginally well. It did not give me the edge I expected. I've tried it on several knives. It will create a fairly sharp edge, but has yet to hone a knife to a nice razor, sharp quality.