Hi
yes they are heavy disks but they are strong enough to go under the mattress rather than under you directly. Originally you got just one disk and it was meant for enhancing sleep. There are various modes on my device and boy do they work. If you have difficulty sleeping there is a mode that will pull you into sleep, a mode to gently help etc and they run through the various brain frequencies to get you into various cycles of sleep throughout the night, Alpha, beta, delta etc and as you set how many hours you want, it will start coming up in frequency and wake you up in the morning.
I started to wake up before my alarm. The magic is supposed to happen in the mode called Recovery (i forget the frequency) but this is the mode you would use if you put the disk over an injured or painful area etc. Not everyone could sleep in this mode but if you could build to it, this is said to be idea and great for enhancing repair and recovery.
I started to dislike the idea of having my brain waves dictated by a machine made but a guy who knew a bit but was basically experimenting. I don’t mean that to have a go, I spoke to Paul (the owner) quite a lot and i know he got to speak with Dr Robert O Becker of Body Electric fame a few times before he passed and he studied Bob Becks work too. BUT, as i mentioned, over time i stopped sleeping so well with it and thought the best thing to do was to be able to sleep fantastically on my own and not reliant on a device.
But, good company, good device, and he has been around a long time and have continued to improve it, so give it a go for 90 days