I long arm and use Hobbs 80/20 most of the time--but I REALLY love Hobbs Tuscany cotton/wool blend--it quilts so well and you get a higher loft with it--price is little higher, but for my customers that like a softer, higher loft quilt, I always point it out. My experience with poly's has been mixed--higher loft poly's just seem to cause me problems (user error probably) and the low loft poly's don't seem to have any advantage over 80/20 other than you get no shrink that causes that puckered look (but I like in my quilts).