All my Pfaff machines have a hard case cover, when not sewing I use it to keep my machine clean and safely stored. When I go to class I usually use one of my rolling trolleys for transport as I can include my needed sewing supplies and only have to deal with one case. I have taken my machine using just the hard case and again it is for protection of my sewing machine, mine doesn't rattle though there is styrofoam in the case to hold it secure.