The ability to create really cool 3D models and place them over real world environments. I can design my own objects that I'd like to place into a scene, add lighting, textures etc. Then it's just a matter of dragging and dropping it into the scene/environment I created previously. It's a bit clunky at first but as you become more accustomed to it it becomes easier and faster. You also have to be careful not to place your objects too close to the camera because they will get distorted when displayed in front of the user. There are other programs out there that offer similar functionality but this one has some unique features that makes it stand out from the crowd. Being able to create complex scenes and place them in real locations is amazing.