Jim, I've got a 6' King Kutter rake and it's one of my favorite implements. Obviously, it's great for smoothing an area in prep for lawn etc. I've also used it for light grading on a dirt road.
I guess the thing I like so much about it is it produces a very nice surface without much effort on your part. The box blade is good for roughing in the grade, but it takes a lot of skill and concentration to achieve perfection. I still use the box blade for the rough work, but I can stop well short of perfection and change to the rake. A few passes with the rake and the minor imperfections of the box blade are gone, leaving the area looking just great. The tine marks also provide a nice sanctuary for grass seed if you don't have a seeder of some sort /w3tcompact/icons/smile.gif