I absolutely loved the writing. Something i haven't seen anyone talk about yet is that Rachel McAdams loses her glasses when the plane goes down. Glasses that she doesn't need on the island so i'm assuming they are practical blue light blocking/readers.
Not only do these glasses end up killing a guy in the crash BUT -
That's when she goes from a "plain" bird lady with some gracefulness and confidence issues to a "Hot" woman who's on top of her shit.