When I do this, I let myself dose off and in every hour or so I wake up due to the mp3 playing. I know I've achieved REM because when I wake, I recall fragments or even entire dreams or scenarios that was taken place before I woke.

It is the exact same feeling I get when I do the wake back to bed WILDs that have achieved me a handful of full on Lucid dreams.

It seems like I am so close, just a small step away from actually entering a dream. I feel like I am just about to step into the dream, and then suddenly I am completely awake.