So, this knife sharpener is pretty good. For the pros and cons:

Pros:
Knives pretty sharp in a short time with minimal effort (pretty important)
Robust design, seems well-made. I can imagine this product lasting 20 years or longer with careful use.

Cons:
Don't bother trying to sharpen serrated knives despite the product's claims. You will ruin the stropping disc in a short amount of time.
I can't get a really finely polished blade, the medium disc is too coarse.
You can't replace the discs without sending back to the factory. ...Read more

Been hand sharpening for 40 years & never realised how good it can be. I chose this 120 model as it has the 3 wheels. I was not sure about the 3rd stropping wheel as I've always used a leather strop but it does the job quite well.

Very very easy to use & any dull standard kitchen knife will shave hair off your arm after just a few pull throughs. I can get a knife sharper by hand but this does the job just fine for me & it does not take sitting down with an oil stone for 20 mins as I have always done.

I'm an electrician often repairing kit...Read more