Lost my left ear in early 1980s, stapedectomy surgery went bad, no fix.
Over subsequent years I had two wired BICROS aids. The very best aid I ever had was a wired Starkey K-amp BICROS ITE. The sound was great and I could talk on the phone (old-fashoned landline phones in those days) like a normal-hearing person, using my left ear - no feedback because no speaker on that side, mic only. The wire was a pain but not enough of a pain to matter.
Note that dajLivermore is exactly correct, “Where is ‘here’ dear?” is the order of the day. Neck muscles get a workout swiveling the head. But in work environment the people on my left side did not fade into nothingness, I could hear them even if it wasn’t obvious where they were.
Costco did not do BICROS when I went there in 2010 but they were so much less expensive than anyone else, and the guy who had fitted the K-amp had retired, so I went back to one-side.
Found out last year that my company’s insurance started covering hearing aids. Went to an Audi (who I actually found on this website) who sold me a Phonak BICROS; I think Audio B is the model. It is sort of a disaster and I should have taken it back and reverted to the Costco Bernafon. Cell phones are not like landline phones, T-coils don’t work with cell phones, but it is still good to hear the truck about to run me over from the left, even if I can’t tell where it is without looking for it.
Anyway enough of my incessant rambling. If you’ve had good experience with the CROS aid, and have enough hearing on your left side to have directional sense, you would probably be better off sticking with a CROS aid even though it means no Costco.