I started anastrozole in July. I'm 57, was in menopause but had never had a symptom (other than cycles off), confirmed by lab. Now with AI -- Joint pain and stiffness, yes, but to me it is manageable. I have not taken any meds for it. I stretch my legs and flex my feet before standing if I've been sitting for awhile, and that helps. LOTS of walking, movement is when I don't notice anything. I was a walker before bc, so I was quick to get back out there. I'm on vac right now at theme park with college age kids and we've been doing 12-14 mi a day, and I tell you, I've slept so well and no pain this whole time!! I won't do that many miles at home, but it proved to me how much it helps. Hot flashes were new to me and i do not like that, especially middle of the night and have a hard time getting back to sleep. But again, manageable, I nap when the days feel long, and I've recently started sleeping better, so maybe it actually does improve with time like they said.
Good luck, let us know how you do.