I had the McCruise (already fitted when I bought the bike) on my ST1300 and used it everyday. In 40, 50, 60, 70, 80, 90, 100, and 110 zones. If I had got to the NT, I would have used it there too.
Great for relieving the wrist, but as Biggles also said, great for reducing the public donations. Easy to use, easy to adjust speed when changing zones (press and hold "Res" to increase until up to the desired speed, press and hold "Set" to decrease)