I just completed FSR treatment on the 30th. I had 30 treatments over 6 weeks (M-F) and the only side effects I felt were some fatigue, which didn't really set in until about the 4th week or so, and some mild nausea, which may have been related to the treatments.
My doc did have me start a low-dose steroid in the last week and I am in the process of weaning off of that in the next few days.
The only real symptom I have had in the course of my diagnosis and treatment has been light facial numbness on my AN side and that has either remained the same or eased up a bit (I feel better when I'm well-rested.)
I'll see the doc next month and then we'll plan for an MRI sometime next year.
I was very happy with my treatment process and the doctors and staff involved. Though I didn't go to an AN specialty facility, the facility I used treats cancers and ANs with radiation and the doctor seemed to me to be very well-informed about ANs and we had some good, detailed conversations.
As a professional orchestral musician, preserving my hearing and facial nerves was paramount and I feel that the treatment I had was the best choice for me.