I have the 830 and absolutely love it. I've never had an issue with my machine. I use the embroidery unit to make machine appliqued and embroidered blocks for quilts, I've used the embroidery unit to quilt the blocks in my quilts. It has been used to embellish jeans, shirts, coats and t-shirts. I like the way it sews and quilts. As you know you have to be particular with your thread. I've learned so much since having my machine. I have a second Bernina I use when going to classes, it is also used when the big Bernina is in for service and updating. That machine is used when the grandkids come over to sew - I set it up in the kitchen. I don't want to sew and embroider at the same time - if I have some "free" time during the embroidery process I try to get some things put away and organized for when I'm sewing.