I use Best Press also. I now use it on all my fabric before I cut as it is so much nicer to cut and sew this way. I do use it somewhat sparingly. Someone I know did a bulk order for a lot of us and we all saved a bundle that way. Not sure where she ordered it from, but she has a conncetion from working with quilt shops and gets great discounts.
Just an added note: I am asthmatic and the smells in BP don't bother me. Hmmm. Guess I really don't use much after all.