Not sure which Viking MegaQuilter you are referring to, the 9" or the 18"? The 9" model is built by Janome and the 18" model is built by Tin Lizzie. So, there have not been may problems with either one. Tension is the most common problem, which is easily remedied by using quality thread. I own the Pfaff version of the 9", also made by Janome and have had no problems at all with mine.