The fact that it's free to use, not expensive at all to download or install. It has many features such as fluid flow, heat transfer, and mechanical stress analysis. I don't have any complaints about this software. I think it's very user friendly and easy to learn how to operate it. You can easily create your own models using this program. For example, you could make a model of blood vessels in order to study their structure. This would be helpful when trying to find ways to improve them. Also, if there are problems with certain parts of the body, we could try solving those issues by creating simulations.