I've done 2 quilts with spray basting but I'm going to use the boards on my next one. I think that spraying is great - but it is too easy to have the fabric move around. However, I have not left it overnight to dry so maybe that is my problem. The corners got a little loose. Otherwise it certainly was easy. And I don't smell anything on the quilts after quilting. I use the bernina BSR and free motion quilt myself. I love it.