Since this arrived at our house about 4 weeks ago, our 2.75 year old has only woken us up when his sleep buddy light goes off (except one time when his grandparents arrived & he was so excited he couldn't wait). It has been a WONDERFUL WONDERFUL change in our life. We know that we won't be woken up before 6:30 in the morning, and that we have until 2:10 before he gets up from his nap. One key for us has been to not stretch him too far. While we'd like to sleep in until 7, we want the whole thing to be successfull, so we keep it set at 6:30. Before, he was waking up between 5:45 - 6:30, usually around 6. The light is easy to use & arrives with some things that make it easy to implement (gift wrapped for child, book to introduce, rewards chart). My son actually LOVES his SleepBuddy & is happy to see the light come on each night.
Sleep Buddy Complete Sleep System