Ok then, closing up shop. Final review:
I'm sorry to say it, but I don't grok.
Stranger was, I think, very much a book of its time. And at the time it must have been shocking, revolutionary, incredible and zeitgeist-capturing. Now it's just another old story that gives us a fifties near-future, that frequently slows down for philosophical detours and that is rather full of itself.
Seriously, the book feels more like an excuse for Galtian expositioning than an actual story. It starts off well, but suddenly stalls and loses momentum maybe 1/3 of the way through as all potential difficulty and conflict is eliminated. And from then on it's mostly just characters explaining to each other why they are so obviously correct about everything. Almost every character in the book either starts off as a monologuing know-it-all (Hi Jubal!), or becomes one after being converted to Martianism. Gets a little old.
Frankly, I liked Mike much better when he was a wide-eyed child. He redeemed himself in the end by revealing to Jubal that there were still cracks in his certainty, behind the facade. But it was too little too late, for me.
As has been pointed out often, there are some problems with attitudes towards women, gays, and so on. Problems which aren't present to the same degree in other Heinlein, if you're wondering.
I enjoy Heinlein, even though I didn't care so much for this one. I hope this book won't put people off from reading his other works.