I have a 2-3-4 thread Elna serger that comes with cards that tell you how to thread it and the different tensions for the different stitches. I love it. It doesn't have a cover stitch function, but what it does, it does beautifully. I bought it from my dealer several years ago and it came with start-up classes. I've made placemats, napkins, scarves, doll clothes, summer capris, etc. it won't cook dinner or give me a pedicure, but it does what I need it to, well. Jmho.