PS: I am worried about how good the integration with Max is in the end. I know it dynamically updates the content, but aren't there any stability issues esp. when working with large scenes?
I was exporting a huge level using FBX into 3dgs. It's a slow process, but in the end everything came in as expecting. It's still a pain if you intend to update something, so I guess here Unity wins bonus points. You keep saving/updating in max while it updates inside Unity at the same time. No need to import huge files over and over and worry about placement in the world.
When you put a 3dsmax file into your project folder, unity will open the FBX exporter from 3ds in the background, export it to fbx, and close it again. When you change the 3dsmax file then, unity will recognize that and reimport it. I never had problems using it. You probably have to assign the textures to the materials again, but well it's not that much of work either and you only have to do it once.
