I really like spray basting. I'll admit, there is a very small amount of fumes, but it's not like I'm sandwiching ten quilts a day...maybe just one a month...if I'm extremely industrious. The thing I like about the spray basting technique is that you can lift and reposition the fabric if needed. That really comes in handy for me and has helped me to eliminate any puckers. It doesn't gum up my needle either.
~ Cindy