Sewing machines are complex, but ive had experiences both ways with them. One model I had endless troubles with both getting to run and keep running well, but then ive had others that are seemingly bulletproof. At my family's cabin my great-grandmother had a foot powered one that to this day works flawlessly and has never seen any maintenance or repairs ive ever seen and she use to make tons of quilts on it. I don't use it much these days but I do squirt a bit of oil on it every few years and make sure it is still working.