I’ve got one, I love it. It can do traditional Japanese veg prep better than a yanagiba, but it is significantly worse at that than a usuba. It also not nearly as good at slicing as a yanagiba. Honestly, it’s among the most useless things in my kitchen. But I love it!
When you need one knife to do it all. Katsuramuki, slicing meat or fish both raw or cooked, filleting small fish quickly, k-tip can be used for some detail work. Idea size will be 270mm or 300mm imo.