I have an Elna Supermatic and it's nice machine. Elna's have a good stitch quality IMO. The Supermatic ca take cams too and Elna has lots of them! The most common problem is a flat spot on the pulley which makes the machine sound very loud. You can buy new pulleys from White's sewing. That's where i bought mine from and replaced it myself using the tool he rents for the job.