Personally, I find Gutermann too linty. Just used an entire spool of poly to darn/mend the knees of pants. Was a nightmare, thread nests, breakage, and gobs of lint when I changed the bobbin. I used it because I have a set of spools that came in a kit. When I ran out, I finished the same task with Coats and Clark and no more problems. I gave the other spools away. Candace from Elk Grove, CA of this board, put me on to Aurifil and tipped us off to the Aurifil clearance at Tristan Threads in BC Canada. Still not cheap, but an amazing price for Aurifil. I bought a LOT! I'm loving it, minimal lint, no breakage, the 50 wt is just right for piecing. I put In the comments box that Candace had referred me, they have a rewards program. I would never have tried it without the sale, but it really is great.