Once I spray-basted, I never pinned again. My last quilt, which was a Jelly Roll Race quilt with Minky backing worried me. I was afraid that spray basting might not work. I used a product in a Pink and White can (not here with me and don't remember the name) which I bought at my LQS. I was very careful to spray the edges of the top (no batting involved). It attached beautifully. The edges never moved (never had that happen before using 505 or Wal Mart brand). It made FMQ on my domestic so much easier.