This product is brilliant*, it gives you a bit of a brain workout to get you up, and you can use either a buzzer or a radio to wake you up.
The only problem is:
If you're like me, you get up really slow in the mornings so when the alarm goes off, it needs to register in my brain and nag me long enough for me to reach over to the alarm.
Now the problem, quite a BIG problem in my view, is that the alarm only rings for 5 minutes before it stops if you don't attempt the puzzle or wimp-out.
So, as I'm being woken up by the voices on the radio, I lay there slowly coming to my senses and after 5 minutes of my brain receiving a nagging wake up call,.... all is silent again. So I'm out like a light.
*Brilliant you say? No.
I can't find a way to extend the alarm duration, and I can't find a manual, as I threw mine with the box. If you can fix this, then I take it all back and give it a 5 star rating. But, as it stands, it does not meet my requirements and is a major flaw.