71 years old and very active and still working. AMSAN here since last August. After  some misdiagnosis, I was tested for and found positive for the antibodies in December.
I have never had any pain or paralysis (yet) just numbness and incredible fatigue. The fatigue is very bad in my shoulders and arms. The legs are not so bad mainly numb.
I feel fortunate compared to some that I read about as I can function ok for a few hours a day. I also had nearly 70 years of great health leading up to this as I watched friends and family die around me. Life goes on. IVIG is my tonic.