I also used Bay Audiology 3 years ago after persisting without hearing aids and hearing in only one ear for the last 20 years. I found them very good and also went with a cros-aid device for my non-hearing ear. Made no difference to my sense of directional sound, but did help enormously when sitting in a meeting and hearing the person on my left. Should have done it years before.
If you end up with a type that needs replaceable batteries, do not buy them from a supermarket. For the ones I use, they are 4 x more expensive than buying a bulk pack from Bay Audiology.