it works for us for HW (habitual waking). I have tried at 1h before the habitual time, go in to rub DS's earlobe to get him to stir or roll over and sneak out. We just did that a few days ago and it worked!
Hope it works for you, too. Please feel free to ask any questions you might have. When do you go in and how much you have to "wake" LO take a bit of experimentation. The first time I tried, I didn't know better and couldn't stir DS, so I lifted him completely off the mattress and placed him back

he cried as i woke him too much

HTH!! Good luck!