Bests & Worsts Reviews from Amazon

This device worked perfectly right out of the box. But when I tried to use it the next day (fully charged) it would not work at all. It would connect to the app but it would not pick up any signal. I tried all of the tricks that the app and website suggest but still nothing. I got an email regarding updating the app. So I did that and the headband updated as well. And still no consistent connection. I cannot even start a session - I can't get past the initial connection screen! And if I am lucky enough to get past the initial connection, it fails in the calibration routine due to lost connection. I bought this to relax and now I am more stressed out about wasting my money!