I'll give my brief experience with hearing aids. As most AN surgery patients, I have SSD and one good ear. First of all the good news. BAHA is normally paid by insurance. So while most insurance won't spend $5,000 for hearing aids, they'll cover the $15k BAHA .... Strange.
I trialed the CROS and BAHA headband. Clearly BAHA is real cool and I could see how you could start to understand direction since the sound is a little different. However, for me, the hearing aids are worse than SSD. I trialed the Phonak CROS II, and I didn't like that they amplified background noise as well as voice. For example, grocery bags would crinkle and be almost as audible as voice. This appeared to be the same issue with my BAHA headband trial.
For the most part, I have no quality of life issues with SSD. Not I'm socially active and there are certain situations that are impossible with SSD. For example, someone sitting next to the deaf ear. I've learned to adjust my life so when I sit in a restaurant, walk down the hallway, etc. I minimize people next to my deaf ear.
I'll immediately buy hearings aids if they were better at separating noise from voice. Until then, I'll save my money.
However, as with all AN topics, i'm sure others have the opposite conclusion as me. As we know, there is no right answer when it comes to AN.