It depends. Do you take your machine to sewing/quilting classes? It is very useful for that.
Is your machine at home in a sewing cabinet or table so that it is flush with the surface? If it is then you don't need it for home.
If at home your machine is sitting on top of a table or desk then it could be useful.
I only use it when I go to a sewing class. At home I have my machine mounted into a sewing table so that it is flush with the sewing surface.