I do not personally have any experience with the 830, but have heard that they do take some getting used to. Did your dealer offer classes on the machine, and did you take them? I love my Berninas, but do not want to do any embroidery so do not have a machine with that feature. Are you able to sew a basic seam without trouble? Is it only when using the embroidery that you are stymied, or is it giving you trouble regardless of what you do? For what a Bernina costs, I'd be going back to the dealer, plan to spend some time there to show them what is happening when you try to use the machine and have them show you how to do it correctly or find out exactly what is wrong so that they can fix it.