So far it seems to be a winner by offering better latitude than the previously popular “Super flat” preset that many people have been using. Of course, when using the CineStyle preset, you will have to color correct all of your footage in post to avoid a flat looking final product. But with the extra latitude the CineStyle preset provides you, you can more easily choose how you want the final product to look.
Still not convinced? Check out planet5D’s blog post for more examples of CineStyle in action.