When I was at the Audiologist last, she gave me a sheet of various shakers and boomers to go over and pick from? Of course she said the most expensive was best. After reading this, I am confused between the shaker and the Sonic boom, and the flash,, first of all, sometimes I do find myself off the pillow, I like to sleep with 2 pillows, so maybe that won't work for me? With the Sonic boom, is that just a loud alarm clock, what about it damaging any hearing one might have left., with the light flashing I'm not sure if it's enough? Wonder what's best to start off with? I assume the vibrators run on batteries, how long do these batteries last if the device is being used often? I hate to put the money out and find it doesn't work for me?