I have a 6600. I like it but, there is no pattern reset button so when you are sewing and get to a place where you want to pattern to start again the only way to do it is to go off of that stinch and back on. If you haven't made any adjustments to the stitch length or width you are ok. If so then you have a whole nuther problem. I like the thread cutter and I never have had to get the bobbin thread back to the top of the machine. When you begin to sew it just appears, however it usually does end up in a wad on the back of the fabric. That bugs me a bit.