I have a Gro clock and love it - DS was getting out of bed at around 5 = now we have it set for 6:45 and he stays in bed even if he wakes up before that until "the sun comes up". With DD she is a bit older and we have her normal alarm clock set for 45 early so she knows she has to stay in bed until it says 6 - not so successful with her but she will come in our bed between 6 onwards and sometimes fall asleep again so it's not too much of a hassle. Good luck and I highly recommend it!