Based on a conversation with a friend today, I thought this would be relevant:
I have a friend from college who has really bad rotator cuff degeneration. He did not mention it to me until Feb 2022. He wanted to try ICES-PEMF before undergoing surgery. So, he started using the A9 in late Feb 2022 and has been using it for about 5 - 6 weeks now. He says it definitely stopped the rapid degeneration/loss of function he was having the last few months. His PT also stated, based on his MRI images, that in his opinion, that shoulder should no longer be mobile. He is very surprised that my friend can move his shoulder at all.
Of course my friend is very active and has continued to work and exercise throughout this, and he is probably not giving himself enough time to really start to heal, but he has been able to resume work and exercise (mostly) without pain. I think he is over-doing it physically, but he says he generally feels pretty food and is willing to keep using the A9 for as long as it takes for him to recover.
He uses the device set to H as long as he can during the day (not at night), with coils side-by-side over the location of greatest pain.