"What do you look for in a singer Featherweight"
finding one you can afford. They are work horses. Best sewing stitch ever. The only problem I have is readjusting myself and sewing when I get home and use another machine.
You need to adjust your settings, seams etc to make sure the piecing is consistent.
Just had to add this to it. But seriously it is the best machine made for straight sewing. You can learn to clean and adjust yourself. It is light weight, etc etc etc.