Well.....I love Sullivan's and do believe I haven't lost any brain cells. The main thing is not to overspray. I have let quilts sit for several months before quilting and they are just fine. Many quilters I know swear by Sullivan's. As with any propellant you do need to have a well ventalated (sp). I think most of the problems with any type of spray baste are caused by way to much spraying. As with most products a little goes a long way. If you do have a needle that does get gummed up the alcohol and cotton ball are your best friend.