I have the Janome 6600 with the built in accufeed--similar to a walking foot. I have used a fewdecorative stitches with success but they all move forward. My favorite is a serpentine stitch. On my machine it is mode 2 #29. I have also done a little flower stitch sand I forget the others.
I practiced the ones I wanted to use on a small quilt sandwich and then wrote the numbers down that were successful.