It is a rare thing when the movie and the book actually resemble each other. Which, of course, make Revolutionary Road a rare movie adaptation.
It didn't hurt that I re-read the book just before seeing the movie. In many ways it made it a richer experience. I was free to enjoy the powerful performances. And, having just read the book, I was able to compare the movie and the book for content and impact.
I know that sounds like a lot of work; but eventually I got so caught up in the performances that the reading experience hardly mattered anymore. I was riveted to my seat.
My only criticism is that the "back story" of why Frank and April see themselves as special gets short shrift. Although, I am not sure how it could have been added without lengthening and somehow diluting the story line.
This is an amazing piece of work; go see it!