I use Guterman; C&C as well as Americana (available at JoAnn's). The Americana is actually quite a thick thread and I have difficulty using it with the #11/12 Roxanne needles that I like. But I use whichever one is the color I want and mix brands within projects as well. As deemail says, thread the needle from the last cut end (first end off the spool)...it does make a difference in tangling. And I second the vote for Thread Heaven. Find it works far better than beeswax.