I find really interesting the full version you can unlock for little money. Since the measuring sleep there the (I suspect) to the movements the depth of sleep states. Then you can with the "" smart Awakening "NEN set period (eg 30 minutes) and the program will then awaken one when one does not sleep anyway so deep. Whether it works? I can not quite say, but I had the feeling pleasant to wake up. Otherwise I troubled times about the alarm (whether music or noise). I also find the opportunity to monitor their own sleep and in the morning to view the diagram cool. In addition, the program can record sounds in the night. Interesting if one suspects in her sleep talking.