You did not make a mistake. I bought one 6 years ago. Had problems at first with thread breakage big time but the hook was changed and it got better. I got better with adjusting the tension and so did the technician 😀. I did write about it here. I have to say I love it and am happy I have it. I thought I would use the embroidery module more. I do love to quilt on it. Love so much about it - knee lift, needle up/down, just on and on. I used the BSR at first, lately not using it. Like others have said, get classes. There are also a lot from Bernina on YouTube. I have two recommendations. Clean, clean, clean the bobbin case, especially when quilting. 2nd thing is to oil regularly. Enjoy!