The Stitch Simulator is something that I use all the time before I head to the machine. Right off the bat I can see if I need to do a color sort. I can even watch the design stitch out to see if it has proper underlay for the fabric I'm stitching on OR if there are a lot of jump stitches. You can even add color stops - oh yes, lots more information in the program Help or PDF manual on this topic!