I've read all her novels and think she's one of the greatest writers and thinkers. Her philosophy was a product of the time - remember she was a product of the Russian Revolution.
Yes, she was extreme, and she could be abrasive and quite rude. However, her books have been my favorite since I was 14, when I first read The Fountainhead. Although I agree with you, PB, that Atlas Shrugged is a great book, We The Living has always been my favorite, perhaps because I find the characters to be her most human.