Yes me and my husband tried it for the first time. The photo I posted is not me but my husband. (I could not post mine.)
I felt very relaxing, sleepy and I feel very light after the session.
That night I fell into deep sleep waking up very fresh and rejuvenated.

As per therapist explanation,
It removes the old blood in our body.
Every 90 days our blood cell dies, and produce new blood cells. ( Regeneration)

That's why I understood why blood donating is somehow, has advantage. In order for our blood cells to regenerate new blood cells.