I have had a serger for at least 20 years. My first one was a lower end Bernina and the threading was the worst part. If one of your threads break or run out you have to start over. I traded that particular model in for a more expensive one several years ago and I have never been sorry. It is much easier to thread. If something breaks or runs out you only have to rethread that one. I make at least 20 simple Linus quilts a month. I make them envelope style and use the serger to sew up the three sides of the original sandwhich and then birth it. The serger makes a sturdy seam with little bulk and is fast. I then birth the pillowcase type creation and machine quilt it using a decorative stitch and usually varigeted thread.
Over the years I have done garment sewing first for my daughter and later for my grand daughters etc. The serger is wonderful, especially for knits.