I have tried using a Bernina 730 and found it difficult. Seemed all I did was stitch, undo the side clamps, roll forward a little, reclamp, lock and start all over again. The stitching space was limited. With a longer arm, I believe I could have been more successful.
My problem was my back. I had the most difficulty standing for long periods in the same spot. I cannot do it. Too much hardware in my back and I am fighting to have more added. I do much better FMQ using the "stuff and fluff" method.