These machines are awesome and powerful, but were getting poor reviews when they debuted in 2005 because of a bobbin problem and a software problem.  Singer has moved to fix both problems.  Newer stock of machines have a much-improved bobbin cover, which eliminates the problem of the bobbin getting progressively worse.  A new version of the software has no known problems.  You can update your software at their website, or call customer service to get the problem fixed.  I have found their customer service to be first rate.  Poke around the website for tons more information than is in the books that come with it.