I'm getting ready to try a 6600 next week. I've been looking at them on line and my husband has ok'd the purchase. I would love to talk to someone who owns one. Is the larger throat a big difference for you when you are fmq? Is the acc-feed foot really a great feature? Is it user friendly?. I have to go to Lake City to test drive one. The owner's wife of the shop has one and he will have her bring it in so I can sew on it. I'm a little nervous about a large purchase. I just want to have the right machine for me.