To give a brief introduction, Omniverse USD Composer (Create) is a free and powerful software.
Although it is not very mature yet so it has some bugs, the rendering is very good and is suitable for cartoon styles similar to Pixar.
The important thing is that it is faster than IRAY. But if your Project has SSS material, the speed will be slower (but still faster than IRAY).
If you have iClone, you don’t need to learn much to use OV. It is very convenient to export USD from iClone.
If you are not sure whether you should use Omniverse, I can provide you with two considerations:
one is your hardware equipment, and the other is the formality of your project.
Omniverse requires an RTX graphics card, which means at least a Nvidia RTX 2060 or 3060 graphics card. It is recommended that a 2080 or 3070 will be better in terms of speed.
I usually use Omniverse to render static images, or at most render videos within 30 seconds.
Since I only have an RTX3060 graphics card, it takes 30 seconds to render a static image (1920x1080). If there is SSS material, it takes 3 minutes to render an image.
If you are used to using other Final Render Engines, you don’t have to use Omniverse. Just continue to use the software you are used to.They are not absolutely good or bad. Here is an introduction to people who only render in iClone.Omniverse has three Render Modes, Realtime, Path Tracing (Interactive), Iray (Accurate)
The experience mentioned here is based on Path Tracing Mode.
Thanks All ! ! ! 
Ranger J
Edited
Last Year by
Ranger J