i havent used it yet
but the advantage is u can navigate with it while the other hand with the mouse just selects and clicks for example when you model or using graph editor and u rotate zoom or pan on the model/graph watch how much repetitive movements and clicks u make while owrking, with this spacemouse u have somekinf of a controller to do all that instead basically saves time and repetitive movements which i suffer from now in the form of wrist and knuckles pain in fingers and can work less than 50% than i used to