Fortunately, I've never had a problem getting up when my alarm went off. I don't think I've ever even used a snooze button.

For a few years, I had a TV with an alarm feature. I liked it because it's nice not having a standard obnoxious buzzer for an alarm, and I don't like the radio. But most days, I'd never even hear the TV. It got to the point where the sound of the TV turning on was enough to wake me up (and I'm a very heavy sleeper). So I'd hear the TV turn on, and be awake enough to get out of bed and turn it off before the audio started.