I love using the basting spray and that is the only way I baste my quilts now. I have made at least a dozen large queen size quilts that I spray basted. I have the wonderful option of going to our church ( basically down the street and across) and pushing tables together so I don't have to get down on the floor.
I also have Dh and another friend well trained in how to do it. Last night we did 4 quilts in less than an hour, including cutting the batting to size.