Took a good 7-8 days to feel anything but felt I slept better and helped my very stubborn digestion system start working better than it has in a long time.
I believe the product worked well: I had a a sense of calm during very challenging times (2 hurricanes in Tampa). I felt like I had less bloating. However, I was very tired the next day if I took the magnesium after 5:00 pm.