I love it. I have also a Janome 7700, but even following exactly what the manual told (DS1, tension 7, length of the stitch 0, feetdogs down) my uper thread (coton very good quality) is broking very often, and about every 10 point, it jump one point, so the stitching is not regular : something like that : _ __ _ _ _ _ __ . I changed the needle to be sure it was fine, tried size 80, 90... always the same mess! I used a Elna 1 for the parts I could do with, any problem of tht kind. But in the middle, I needed the space given by the Janome arm.
May I ask you if you have tricks !! And excuse my english, i am french.