My wiimote with smoothboard works ok for about 10 mins but then it loses its tracking. The tracking is off by about 2 inches to the right, ie I have to point the pen to the right 2 inches of the spot I want to point at. It's pretty annoying. I noticed someone else had an issue as well. I have not moved anything, it has been this way since I purchased the software in November 2011. I have been recalibrating each time this happens. I have great great tracking utilization of 44%, the wii is mounted off the ceiling and my projector is 2 feet behind the about 2 feet below the wii remote.