Bought this for my ex-wife for Christmas AND in view of her new job…she never was any good at waking up!! Well it’s nearly April and she hasn’t been sacked yet (some kind of record)….so although she says this device is indeed as good as other reviews I consider the fact she still has a wage coming in the real test of this products metal. If you need a stealthy reminder to get your butt out of bed then you need a Sonic Bomb!