Unfortunately I suffer from sleep problems and so I did not arrive late to work, I need more alarms. I use this and more interval alarms on mobile. This alarm clock is unacceptable in my eyes, but not excellent manner, my main point of criticism, it is not as loud as I had hoped, though I wake up reliably, but this effect that you want to get up immediately, because you otherwise wakes the whole neighborhood it not. Say I let it ring for a few seconds in the morning before I get up, because I'm afraid in this volume is not really ne harassment of neighbors. But I will still buy it a second time. Thus, it will ring for two hours with me.