I have 4 computerized sewing machines. The pc boards have went out on 3 of them twice. The cost to replace the boards are very expensive. But my vintage all metal machines just keep on going. I love the old Kenmore machines with the cams, the 401-500 series Singers. The Singer machines in the 401-500 do not take a belt, they are gear driven. Most have 3 needle positions, zig zag, cams, or builit in stitches, & drop feed dogs. A walking foot is easy to use on these machines. I guess it's everyones' own preference.