Well this was made with a really limited use in mind, so you can't really compare it to Maxwell, vray, mray etc.

Basically the only things that this is practical for is product visualization, where you'd use a hdri as a backdrop and achieve the same lighting. So any kind of complete scene etc. is really unpractical for this, and if you've used hdri to light stuff in other renderers you'll realize this. Basically think of this renderer as a 'dome lighting renderer', as that is just what it does, lights and renders your objects with a hdri dome. But it does it really, really fast.

But there are a lot of people (moi/rhino users too) which would fill most of their needs with this renderer, as these kinds of renders is all they do. But as soon as you get into scenery, archviz, etc. which need more advanced lighting obviously this is not practical for that.