No, it doesn't set the angle for you.

It's nothing more than a squared-off piece of fancy carbide, 3/4" long, bonded to a steel handle.

You scrape it across blade edge, first one side and then the other. It's easy to see where you have scraped the steel, so if you need to adjust the angle you can. But it's essentially freehand.

I think it's better than any pull-through sharpener I've seen, and IMO a lot more versatile.

But I can't comment on the Lansky, except to say that any sharpener is better than nothing when you're in a tight spot.