This was my first time of this dose. I did feel some sensations but I will need to try it more times to see how it progresses. I did notice that at about the 1.5 hour mark, I tried to slowly open my eyes and my whole body shook. Afterwards, I closed my eyes again and I heard hissing at first, but after about 30 seconds the hissing went away and I heard the binaural beats.