I have the 11000 and overall I like it. My only complaint is that I've had to replace the bobbin case twice. The first time it was replaced, I was told that it seemed to be jumping out its "place" and causing thread jamming issues. (I took it in for repairs because I kept getting thread messes and bad stitches.) The next time the machine went in for work was because of loud noises that sounded like the bobbin was jumping again. The stitches were fine and I wasn't getting messes; it was just loud. The tech changed the bobbin case again and even though it's better, it's still loud and annoying.
Overall I like the machine and as long as I get good stitch quality I can live with the noise.