I have used Connecting Threads 50wt cotton for several years and it is very good thread and I will continue to use it, I was using it for piecing and quilting, then.....I read about poly thread on here and had some and tried it, what a difference in lint. Poly is much cleaner to sew with when piecing. I do still prefer the Connecting Threads for top stitching though, and I do have to add that their prices are really good, especially with their sales. They don't carry aurifil,but they do have both cotton and poly thread and a large selection of colors.