The off brand, purchased from a teacher supply store, by the gallon is cheaper and works just as well. I dilute it about 50/50 for sandwiching a quilt. In my experience, it is NO FUN to hand quilt through, so now only glue baste for machine quilting.
For glue basting pieces, I bought the fine tips from Sharon Schamber's website. You can screw them on to the little bottle. I save the small bottle and refill it with the gallon jug. When basting pieces, I don't dilute it. Always iron to set/dry it before sewing.