I had so much trouble with a Christmas quilt I was making for my daughter & asked the QB for help. Spray 505 was recommended by several members & I used it with tons of success. After pinning & repinning twice I was frustrated beyond measure & thanks to the members here, it worked out perfectly. And to those members who think it is too expensive - I don't know what you pay in the U.S. but here in Canada, our local fabricland charges $25.00/can. Now, that's expensive. Absolutely no negatives except of course, the price.