I just got my 6600P about 2 weeks ago and I LOVE it. There are so many things I love I can't think of any one thing, the automatic cutting is very cool I must say. I only have one complaint with it and that is the leg bar is hard for me to reach because I'm short, I probably look like Suzanne Summers workin her Thighmaster. Good Luck with your purchase, I am not hunting for an embroidery machine.