I have a 6 needle embroidery machine and I use poly only, I've read reviews about rayon and decided poly was the way to go. I have purchased mine from various places and recently Shoppers Rule has been having a weekly special. I got 6 spools for 4.99 plus shipping for a total of 8.29. The thread is great and my machine has no problem with it. I have paid the big bucks for Maderia, RA, etc. and personally I see no difference.