Not useful for heavy sleepers
When you look at the watch descriptions, it sounds like it is a high tech devise that detects your sleep cycles, but it actually has nothing to do with the 5 stages of sleep cycle.  It basically detects when the watch is moved, you know, just like the Nintendo Wii knows when you swing the remove control. It beeps when you move your arm or turn over, and their idea is that you tend to move when you are in the lighter stage of sleep.<br /><br />The problem I have with this that when it beeps, I wake up for a second but fall back to sleep right away.  It does not snooze like a normal alarm, so once you missed the time you set, the watch does not go off again.  So the watch does not help me getting up and is basically useless for me.<br /><br />There is also a glitch in the time calculation. When it records your sleep for more than 8 hours, it shows a totally incorrect time.  I asked the manufacturer about this, and they confirmed the problem and told me that they would send me a software patch to fix the problem.  Unfortunately, a month passed, three months passed, and 8 months passed now, they keep giving excuses and they still haven't come up with a fix yet. I am disappointed with this matter.<br /><br />After evaluating this watch, I think this watch is overpriced for what it does.  If you are a heavy sleeper like me, it probably won't help you getting up in the morning, and if you are a light sleeper, you probably won't need this watch in the first place.
Rating: 2 stars