i buy poly batting by the bolt to use with my long arm-
many of my customers prefer the poly batting.
i've been using it for years-
personally i love Dream Poly- my favorite batt is Dream wool-
dream orient and dream bamboo are also wonderful batts
i've used them all on the long arm-
the only batting not suited for the long arm are the ones that are very thin & fine----recommended for hand quilting-
those tend to separate & pull apart easily just from their own weight hanging over the frame....if they are good for machine quilting they are good on the longarm.