Thanks for the ping! Publius and I have done such a reconsideration in our
Who Is John Galt?. Some people who dismiss the novel out of hand have only considered one aspect that they find distasteful - for our friends on the right (if you can call it that) that issue is often atheism. There's a very great deal more to the book than that. Certain others read it in high school and consider that they have "outgrown" it when at that age one really doesn't have the intellectual horsepower to give it the consideration it is due. Or so Publius and I think, anyway.
Certain other critics find Rand's personal life to be either too inconsistent with her precepts or too thoroughly consistent, at least with the more convenient ones. I think that's a little like criticizing Milton for kicking his dog, but that's just me. Give us a read and see what you think.