I have the 6600. I really like the accufeed foot and sew with it most of the time. I haven't done FMQ on it but have done echo quilting on it and Stitch in the Ditch a lot. My machine runs so smoothly, I could sit at the dinning room table and my husband could sit in his recliner next to the table and hear his tv shows without a problem. The other machine I had made so much noise he could'nt hear anything. Equipment pieces kept breaking and falling off of it. It was from JoAnn's. He was glad when I bought the Janome 6600.