don't like the 15-minute shutoff.
Everything works... there's no malfunctions.  When you set the wake-up light, it will come on when it's supposed to.  But then it only STAYS on for 15 minutes and shuts off.  Maybe this is enough for you, but it's not for me.  So it's really useless.  I will give it a few more nights to try, but so far it has not helped me wake up any more than my clock radio.
Rating: 2 stars