Although I like to adjust all the settings of sewing machines, during the sewing process, tuning the serger from regular overlock seam to cover stitch and back began to annoy me. I therefore decided to sell Husqvarna Viking Huskylock S21 (combined overlocker and cover stitch) and buy separate machines for each purpose.
Based on a few months usage I am very satisfied with Juki MO–654DE overlocker. It does exactly what it’s meant to do without any extra adjustments and tuning. It is quick to swap the sewing project from a machine to another.
Juki is also somewhat quieter than HQV S21.