I haven't yet read Parable of the Sower, but I read Never Let Me Go recently. This is what I wrote about it in my notes to myself (no spoilers - certainly less than this article):

This is an odd book. It's very slow paced, and not much actually happens. I think it's best to read it without knowing anything at all, so I'm going to avoid spoilers. It's a story told first person by a woman who attended a special boarding school. For a quarter of the book, there are barely even hints that there's anything unusual going on. We don't get an understanding of it until halfway, and even then not fully. I feel like this might have been better as a novella. That said, it was highly regarded and even made into a movie (that I never saw). The premise is really interesting, and the story moving, but for half the book we're just reading a woman reminiscing on her school days.

I did enjoy it, but it's not one of those books that I'd comfortably recommend to anyone and everyone. It depends on the kinds of things you like and don't like.