I LOVED the Pictorial Quilting Class, but Stupendous Stitching has been my favorite so far. I signed up for Stitch and Slash, and got the Sewing with Texture free by demoing a Bernina machine recently.
I've also done Jeanius and the Jacket class, but I find the garment classes to not be as good as the quilting classes, maybe because they are harder... The jacket pattern doesn't fit me well, but the class doesn't cover alterations
