I have a Kenmore/Janome and I agree; it so isn't picky about they types of thread. I recently took a class using rayon thread and almost all of the class had to use a micromex needle because it kept breaking and causing nest in thier quilts; not my machine I used the same needle I use for all things. My favorite thread is Aurofil; especially when I'm doing piecing where the seam allowance is very important. It's 2 ply and I couldn't believe the difference that one extra thread made in my blocks plus the Viking dealer said it was the best to use in my mega quilter.