Back when I was in high school and college, I was addicted to the snooze button. When you first wake up, it feels so delicious to press the button and get to fall back into your cozy, warm bad.
Unfortunately, it's all a cruel trick. You get back in bed just to be woken up again 10 minutes later, feeling just as exhausted as you were when it first went off, except now you're running late. I've read that it's also very confusing for the body as well.
In college, sometimes I would press snooze six or seven times, and eventually end up snoozing through an entire class. Except none of it was restful sleep. If I just set my alarm for an hour later, I might've actually felt good when I woke up.
In retrospect, I don't understand the purpose of snooze buttons. I know it feels good, but nobody ever feels better after snoozing for 10 minutes. I remember in college, my roommate used to set her alarm for three in the morning to study, but she was so tired, she would just snooze it. She was not my favorite roommate.
Luckily, these days I don't have to worry about the snooze button because I have a child who wakes me up between 6:30 and 7 AM every day by punching me in the gut. It's very effective.