I recently purchased a Bernina sewing machine. When I went for lessons on how to use all the special stitches, the woman there told me not to use the thread I had in the machine. I use Essential Thread which I purchase from Connecting Threads. She said that the thread is not wound on the bobbin correctly and that the tension would not be correct. I have been using this thread for a few years on my Brother sewing machine and it seems to be okay. Has anyone had problems with this thread? Should I ignore what she said and continue to use it? I have a lot of spools of it because I don't have a store near me where I can buy thread. Thanks.