This bobbin set is great. They fit my Singer sewing machine without any problems. The thread is high quality and doesn't snap or break as long as its used right. The variety of colors is great too. I think the best part of this set is the price point. Buying a few bobbins at the store is expensive, and its hard to not have a bunch of them to fit the colors for all your sewing projects.
Now, I have a bunch of colors prewound and can use them in conjunction with other colors. Since my sewing machine stitches 250 different stitch patterns, the color combinations really pop on the material.