Yeah, about as effective as my own alarm clock. Eventually my alarm clock stopped beeping altogether, so I switched to my iPhone, which is actually just as loud and has more effective sounds. Monotone beeps don't work. For regular alarms, I use one with multiple notes, and for abnormal wake-up times I have a duck quacking. An asleep person does not expect duck quacks in their room. Well, not MOST asleep people.
