I sewed seams and very strong. Did some straight quilting and free motion. Also tried some of the Singer Curvy's decorative stitches, and no problems. Each stitch blended nicely into the quilt - both top and bottom.
I tried the blanket stitch at the edge of a receiving blanket. Sewed up nicely, blended well, and was still very soft to the touch. Perfect for a little one!
I am working on a small crazy quilt wall hanging. I had one block ready for stitching. The metrolene added a subtle stitch pattern on the shimmery brocade (barely see it! but it is there) and on the silky lame fabrics. Just the touch I wanted for them. Texture but not over bearing.
My one recommendation is to use your vertical spool pin. The Singer Curvy has one I place into a hole on the top of the machine. Using the thread in my Singer featherweight or my Singer 301 worked just as beautiful, and the pin is already upright!
A thread I will certainly grab some more of. Very economical in price.
I got mine from The Purple Moose. Very accommodating, good prices, and fast service!
Now on to my silk threads. By the time my Crazy Quilt wall hanging is finished, it will be filled with the best threads around!