I have had good experiences with Elmer's school glue and use it often. I did not have bad experience with pins but it made a large quilt very heavy for me and they had to be moved as I sewed. I also have had good results with thread basting and the boards like Sharon Schambler recommends. I do not like the idea of spray baste because of the fumes and mist that settles on everything around. I don't use sprays of any kind in our home.