Projects with a lot of satin stitches are not for the faint of heart. I've looked at more than one such kit and left it in the store because satin stitches are so time-consuming. They require absolute attention to detail that no other embroidery stitch requires.
Make no mistake -- they are useful and look great when well executed. The satin stitch is used for hand embroidery and even monograms. Some sewing machines will do a satin stitch, but I don't think they look as good as the stitches done by hand, the old fashioned way.