I have both the 6600 and the 350E. I have had nothing but love and wonder for what those machines will do. I have had mine for over 2 years with (knock on wood) no problems whatsovever. The quilt shop who sold both of those to me is no longer in business, but they held classes on both and were a wealth of help. If you buy those, I recommend you buy from a reputable dealer that offers classes. I cannot sing the praises enough. However, I want a long arm. Always some want isn't their.