I think this alarm clock was intelligently made. However, I have a question in my mind how would this be really affected. For example, if I set the alarm to 6AM

I think this alarm clock was intelligently made. However, I have a question in my mind how would this be really affected. For example, if I set the alarm to 6AM but during that time, my body movement still says that I am deep sleep, how would that alarm works? Then at 10AM, it was the time the clock detected that I am light asleep, is it the time it would alarm? I hope someone can share me how effective this iDreamSaver to stop my wondering.