I've only done a few quilts, mostly baby/crib size, and have done most of them with spray basting. It's the best! Nothing moves arounds or shifts & I can do any kind of quilting I want to without stopping to remove pins. I put the back down, then the batting & smooth them both really well. Then I fold back the batting about half way, spray onto the backing, about 1/4 of the area, and then smooth the backing onto that area, working from the center to the edges. Repeat with the second 1/4 of the batting for that end. Then do the other half the same way. Gives a nice smooth finish, everything stays in place while you sew & it looks great when done. Especially helpful with a minkee backing since it's so stretchy. :-)