It was great! I tried the deep sleep type on the app and after it was done, i legit feel asleep like it really was the best sleep i had in a while and there is this other experiance i had with it to where i felt like i was moving like with my eyes going forward and right and all that, that was an amazing feeling, now the reason i put 4 not 5 is because of the maget that connects it does not stick anymore it like feel out and sticked to the light device i put gorrilla glue on the headband and it ...