505 Basting Spray
I always use 505 spray to baste my quilts. I have never had any problems - I always baste with a friend and its easy to re position should things go astray!
I would not however recommend that you spray baste quilts that are larger than 70" - they (in my opinion) need the specialist services of a long-arm quilter!
( The spray is also useful for positioning appliqué pieces)