My sisters and I sewed on Featherweights until our teens, then we got new machines. We kept the black Centennial FW that originally belonged to our Mom. I borrowed it from my sister a couple of years ago, remembering right away how to thread it. I love the quality of the stitches and the markings on the SS plate. To me, having the narrow feed dogs on a straight stitch machine makes narrow seams on small pieces easier. I sew on a vintage Bernina 830 and a Singer 15-91, so I'm not used to having computerized features, but I would buy a FW in good working condition in a minute if I had the money.
I would add one of the new LED sewing light kits and buy an extension table.