The ability to rotate the virtual tour around my model. Also, the fact that you can zoom in at any point in the model to see what's going on. It is sometimes slow when I want to create something that takes longer than one or two minutes. Also, sometimes you have to spend some time trying to figure out how to do things. Sometimes, there are issues with getting your project to sync up with other people. Try out the free demo version first. We're using it for our educational museum building. This gives us the ability to show visitors different parts of the building. It also allows them to be able to walk through all of the different areas without having to come in person.