John, it really does get to be familiar and non-scary after the first or second dive. If I was not watching movies, I slept. Here is a tip. Take an antihistamine pill 30 min. before each treatment. This will help with pressure in your ears. Also, my vision improved dramatically and three years later is STILL good. Wore glasses to read and use compute for years and do not need them now. So you may get a big bonus if you wear glasses. I know you will do fine. It does feel strange in the beginning, but the speaker system lets you talk to the attendants at any time. They will never, ever leave you alone. Just concentrate on the good it is doing for you.