I just ordered the fusible crystals by Quilter's Select. That is new. I have the Bonash powder but it is messy and not made for large areas.
wow, amazing new product
If you haven't used a clapper it is great. It's a must have for me but I have demoed it many times for it to be new for my guild. The longer you leave it on the seams the flatter they get and will never get unflat until washed. Sally Collins of Precise Piecing leaves a ruler weighted down on her seams for ten minutes or more after pressing. She has a show on The Quilt Show that she shows her best tips for perfect piecing.