I have owned the brother CS6000i for 2 years . I also owned the EX-660 a ten years ago and I have gave it away to my friend for present. The Brother CS6000 and the EX660 are the same sewing machine with different model numbers. But Cs6000i save yourself away from big problem by buying the Brother CS6000i instead of the Brother EX660. About only a $250 difference (average) for the sewing machine.
