Does anyone have any experience with people with Alzheimer's? It's a very serious thing, and I know posting info like that here is not easy because of the hell not only the victims go through, but also the families. I'm looking for info on what the onset was like, how quickly it progressed, whether there was a firm diagnosis via MRI, etc.

I'm curious because I believe someone I know may have it, and there's been no definitive answer from doctors yet, in spite of testing. The person may be going to a special clinic soon but not sure what will be discovered.