I have used Niagara starch from time to time, nothing consistent. I just took a class where we used templates and cut our pieces. The classroom was sponsored and was stocked with items for us to use, rotary cutters, mats, irons, thread, and they had Magic spray. I used the magic spray and am a believer now. I have bought some since and did my own experiment and can absolutely see and feel when sewing the difference on blocks with and without the Magic spray. I also have terial spray and will dilute and use it up in time too, but Magic spray is definitely going to be near my iron station from now on.