So why only 4 out of 5?
1. It must be said loud ticking could one or two disturbing (no joke, it sounds like the ticking of a small cuckoo clock) Me personally it calms more.
2. The alarm can only be set very Vaage ... you have the red pointer actually EXACTLY place at the desired speed, but even then the alarm may be delayed by 5 minutes (but he does not arbitrarily ... got it, for example, asked. at 7 clock, he goes just always by 5 to 7 going on ... but consistently)