I have a Bernina 440 QE with the BSR. It does help, but has limitations. If you go too fast, it can't keep up. If you are working at the edge of your fabric, it can get fussy and stop sewing becuase it can't "see" the fabric. After a while, I think I can FMQ better without it. I have a Brother, Project Runway machine that I bought to take to classes. I'm finding I lke that for FMQ better than the Bernina (gasp) Right now the BSR is at Bernina getting a firmware update, something I learned about at Bernina Yahoo group. When it comes back, I will try it out and let you knoww