I used C&C for years when I was sewing clothes. I started buying Gutermann because at that time it was considered a good thread. That is before I learned about all the others. I have Superior Bobbin thread but haven't bought any of their other threads since I still have a bunch of thread I need to use up. I did find out that my machine(Brother Innovis) does not like Dual Duty , will tolerate C&C cotton thread , likes Gutermann thread. But the thread cutter on my machine won't cut the bobbin thread . My vintage 401 doesn't care what thread I put in it. It sews without a problem .