Unless you get a 700 model Maillard, they all pretty much sound like coffee grinders when spinning (even if you try to adjust them as much as you can), because of their crude steel races. Maillard only dressed up the pressed steel cup races and cones to the most minimum amount on the mid and lower model hubs that I serviced back on my brother's and my bikes, back in the 80's. It seems like any polishing of the races came just from wear from the bearings. I suspect that the later, top model Helicomatics might last a lot longer than the basic, early ones, as they might have better bearing races and maybe better quality bearings.