Wakes only sometimes

I was looking for a simple, analog radio alarm clock, no frills. This one I liked, so I bought him.
In my copy but it is unfortunately the on / off switch such rickety for the alarm that one knows whether the alarm mode is actually activated or not never. Accordingly, he does not wake even though you think you have the alarm clock in the evening turned previously. As the clock part is therefore unfortunately unsuitable, therefore it does now as a desk clock service.

+ Very accurate thanks to DCF receiver
+ Easy to read
+ Large, clear design
- Weckzeiteinsteller does not lock, it can not therefore accurately determine the alarm
- Unreliable in my copy alarm