I am on my third serger. The first one I bought when they first became available in the 80s. It was a real pain. The second one was a Bernina basic model. I hated threading it but I used it for at least 16 years. I now upgraded to a little fancier Bernina. It is much easier to thread will even let you do it out of order. It doesn't have the built in cover stitch. I was not interested in the cover stitch. In the last year I have put together at least 250 Linus quilts with it. Almost all commercial sewing is done on sergers.