From what I understand, it is a case by case basis. For eample, for heavy people, it isn't as effective because they have extra pressure on the tonsils etc. But, I imagine it would be fine for kids. I would say without a doubt if you could avoid having to use a machine for the rest of your life, definitely persue that. But, there is a chance that it won't work and you'll have to try again.
By the way, if you are heavy and you loose a considerable amount of weight, you may find that either your pressure setting will need to be reset or you may no longer need the machine at all!