I haven't mentioned my ulu, probably because I simply use it. I assume that you mean that when you talk about a rocking knive.

The same rules regarding sharpness and quality apply. Mine happens to be a traditional one, made from a old circular saw blade (you can even more trad ones made from stone, etc. but I'd only use such a thing for decoration). Keep it in the holder it comes with, treat it as any good knife.

Frankly, I wouldn't like to be without it. Learn to use it well and you'll like it very much.