I have the Bernina 440 with the BSR and I love it. I don't use it anymore, since I now have a longarm, but if I were still quilting on a DSM I would definitely go for the BSR. My friends who have it have been quite happy with it too. Sometimes people have problems, usually because they're moving the fabric too fast for the machine's speed to keep up. This is not a problem with the BSR; you wouldn't be able to do FMQ without a speed regulator and move your fabric that quickly. The other problems people attribute to the BSR are usually problems that you would have with any quilting on a DSM - fabric not moving freely so the stitches are bunched up, tension problems, etc.