I absolutely love my hearing aid. I call it my "ear." But my hearing loss is mild/moderate. And it is, at least in part, due to conductive/middle ear loss. Different from strictly sensory-neural loss that you get from the AN (I have that too). Conductive loss is when the little bones in your middle ear don't work right for some reason (I landed on my head in a bad bicycle wreck two years ago). How well a hearing aid helps you depends on what sort of hearing impairment you have.
There have been some huge advances in hearing aids in the last few years. I use the Dot 220 by ReSound. Teeny tiny digital aid, technology wasn't even available a couple years ago. I think your in Australia, Cayce? In the U.S., many states are now requiring that insurance companies pay at least $1000 toward a hearing aid. So I paid about $700 out of pocket. And my doctor's office has a trial program where you can try the thing for 30-60 days before you purchase, so you can see how it works out.
If I'm awake and not underwater, I have my hearing aid on!