Been on it for about 7 months now. I started taking it as I noticed thinning at the front, the crown was already thinning, but I can't see it so I don't care. I feel happier in my hair, I have less than I did when I was in my 20's but it has stopped the loss and allowed for some recovery.
I really had to think hard about going on it. My family has a history of depression, and I've been able to escape it. My biggest worry is that it would trigger some kind of depression. I've not had any issues in this area thankfully!
My willy still functions perfectly too, so I'm not aware of any side effects, and I've seen hair retention and regrowth. The first couple of months I did experience some shedding, but it wasn't bad. It's satisfying seeing some little sprouts of hair reappear.