Bests & Worsts Reviews from Amazon

Five-star device with three-star instructions. Got it as gift for my heavy-sleeping 20 year old whose job starts as early as 4 AM. He said it would not keep the correct time. I asked him if he read the instructions. He assured me that he knew how to use it. I tried setting it myself with the same result--the time was off by next morning. I was ready to ship it back, but decided to follow my own advice and read the instructions. Turns out there is a power cycle button on the back of the device that is country specific. It was on the UK setting. I switched it to the USA 60 Hz setting and it works just fine. Why that would not be prominently placed in the user guide is a mystery to me. Why my son does not yet take my advice is a mystery to me. As for the alarm, it is the only one that has ever reliably awakened my son. I would rate it as scary loud and the vibration disc provides tactile stimulus to further provoke consciousness. I can hear it in the basement from my upstairs bedroom.