The final decision will be his based on how much HE wants to actually be able to hear. I'll assume that along with techniuqel answers you/he would like to hear of different experiences?
Before my CI I did not have a profound hearing loss but it was getting harder and harder to communicate with people, espeically in noisy places, in the 3 months since I recieved the CI I have actually begun to enjoy things again. I can actually understood the person at Mcd's when I ordered there the other day. My dr. and audiologist both say my progress is not typical but I think it needs to be remembered that I was still hearing with HA's tho it was very stressful with lots of lip reading. Stress is now gone.
I went into the whole exploration of seeing if I qualified for a CI based on the fact that if I lost my hearing in that ear to ME it was worth the risk. And yes I was aware that there are risks. (I really didn't qualify and the insurance company was asked to approve based on the fact that I didn't hear past the first sentence in a noise test) I do not regret my decision, my family notices the difference.
So your bf will base his decsion on how much he really wants to hear. If he has a good background in spoken langage and it's becoming harder/more stressful for him to use this mode and it's one he wants to use the CI could really help him, just as it's helped me and others on this message board. But in the end he has to decide if he wants to take the chance......with out the CI I am actually more deaf then before surgery. I did sound booth testing today, including the noise test, I actually was able to repeat at least half of the sentences in each group, usually only missed the last two, tho I haavn't seen exactly how accurate I was since she had a meeting to get to.
I do wonder how much, how quickly and well a person adapts to hearing with the CI has to do with how long it's been since they have heard, if ever. Remember my results aren't typical, but then I didn't have a profound loss when implanted.