Generally what they say is what Ramana said. After you awake you are aware that you slept well. You "remember" being self-aware after you wake up and the mind can remember being aware of sleeping well (or poorly).
That is all.
But almost everyone has this experience, this knowledge.
So when someone tells you he is enlightened, awakened, or is aware 24/7, ask them to describe what they are talking about.
You will find almost without exception, that they merely repeat teachings offered by Ramana, Nisargadatta, Robert, etc., as their own, with the same arguments about Self, No-Self, no separatre self, non-dual, Now, oneness, or the Witness/Absolute.
Advaita teachings are the worst because their arguments are so mental rather than experiential. Advaita is easily turned into apparently logical arguments, as opposed to the experiential paths of Kundalini, chakra awakening, energy work, Tantra, etc., where you actually have to have numerous spiritual experiences of progressive opening.