The ability to create models that can be used by other simulators, or even in real life! It's very easy to use as well. I like how it allows you to add more details if needed after creating your first model. This has allowed me to improve my work with this particular simulator without having to wait until someone else makes improvements. If there were some way of automating certain things such as adding equations when using parameters instead of writing out all the variables at once wouldβ¦