I used to use a clock radio to wake myself up because it is by far a more pleasant way to wake up. However one time I set the alarm and my sleepy state simply incorporated what I was dreaming about into the dream. This caused me to be late for work and my boss wasn't happy with me even though I had no conscious control over this. Ever since I've used less pleasant alarms, including the rooster sound in the Kuku Klok website. Such sounds might not quite put a smile on my face when I first wake up, but at least I don`t have to worry about them becoming part of my dream.