This is truly a great 3D-modeling program...

+ A free 3D, fully-rigged, well-made base model that you can export to a VRM and use anywhere! (do check the license though)
+ A ton of outfit presets that you can switch with a click, and edit as you wish! And they keep adding more and more of them!
+ Accessories that you can import from an online store! (but it may not be free, it's much better to do this from Blender if you have the knowledge)
+ Many hair presets and a way to create your own!
+ Face, body and outfit personalization (contrary to what some people think, you can change the eye style in VRoid Studio)
+ You can make your model take predefined poses and take a picture of them! (no personalized poses though)
- You can't import your own accessory, you have to either make it with hair (scuff) or add it through Blender, but that's some work
- Some hair shapes (like ahoge) can be pretty tricky to make accurately due to the interface
- You can't import your own model to modify it (but that might be asking too much?)
- You can't import a VRM to modify it - you have to own the .vroid file (but I guess that's kind of a protection too)

I widely recommend this if you need a 3D model for any reason!

This is truly a great 3D-modeling program... + A free 3D, fully-rigged, well-made base model that you can export to a VRM and use anywhere! (do check the license though) + A ton of outfit presets that you can switch with a click, and edit as you wish! And they keep adding more and more of them! + Accessories that you can import from an online store! (but it may not be free, it's much better to do this from Blender if you have the knowledge) + Many hair presets and a way to create your own! + Face, body and outfit personalization (contrary to what some people think, you can change the eye style in VRoid Studio) + You can make your model take predefined poses and take a picture of them! (no personalized poses though) - You can't import your own accessory, you have to either make it with hair (scuff) or add it through Blender, but that's some work - Some hair shapes (like ahoge) can be pretty tricky to make accurately due to the interface - You can't import your own model to modify it (but that might be asking too much?) - You can't import a VRM to modify it - you have to own the .vroid file (but I guess that's kind of a protection too) I widely recommend this if you need a 3D model for any reason!