I don’t have any direct feedback, but your post reminded me of a really similar recent thread. I don’t think I found it, but here are some the search dug up:
I don’t Beemind get-out-of-bed time, but I did recently start using the SleepCycle app, which “listens” to you sleeping to supposedly wake you when you are most alert, in a 30-minute window. So far it’s working really well for me. It doesn’t stop you from staying in bed, of course, but maybe waking more well rested could be a factor in helping you to get up more promptly?