Using it as an alarm clock it was a drag through the night, waking up for the first time at around 24 o'clock and activating it again I didn't trust that it got the right time, so I woke up about every 20 minutes until the alarm finally went off at the right time.
Sleep is a fascinating thing, if you have ever tried uberman schedule, you know that it's shapeable. You can do all sorts of things to hack it. But all of it is no use if you can't make proper decisions because you're tired.