I have the 6600 too. Came with all the feet and the knee lifter which I haven't used. I have an emotional attachement to my sewing desk and it won't work on it. I'm sitting at the same sewing desk I learned to sew at with my mom for a teacher almost 60 years ago! I love my 6600 and found it very user friendly. If you didn't get the extension table with it I would suggest that. I never sew without mine.