I bought the Invisifil at the National Quilt Show this summer. I love this thread, it behaves like the silk but so very much cheaper. Very kindly Wonderfil gave me some of their other threads to try out. I haven't had occasion to play with them yet, but I'm excited with the prospect. I just know if I start playing before I've finished the Heart's Desire quilt, I won't finish it.
For the Light and Shade piece for the International Quilt Challenge this month, I quilted a wide attic window style border . On the lighter putty shade of the border I used a filler I haven't used since I made my husband a quilt for the millennium. I had forgotten how quickly this background filler quilting goes, it's possibly one of the fastest out there (something to remember).