I just tested this application by going to sleep on the first choice. I asked my wife to wake me up at the specified time. I heard her coming upstairs to wake me up.

I was completely in shock. I sleep through 2-3 alarms every morning. Also, I had a dream in which I could recall every detail. This only happens once every year or two for me.

This has prompted me to research my sleeping habits and possibly do a sleep study to seek better habits.