The 3D models are very useful for my teaching project.
My biggest fear before buying from 3D Models World was whether the models are detailed as the real ones. But unbelievably it was really detailed and well optimized even I can use it as a 3D model for simulation in my commercial software.

Quality was good!
Before purchasing, I was worried about the quality of the models and the UV’s but I had a good experience fast and easy to purchase.

My fear is that I would not be able to scale down the parts of the 3d model. but I was able to scale down the parts to a working size without any issues, purchasing the items through PayPal was quick and easy, If you need a file and it is on sale, go for it. models are well done!

3D Models World have a reliable Youtube videos / tutorials and great 3d models.