It’s a genuinely enjoyable film that I’d happily watch again and suggest to others. The movie has the feel of something timeless, like an origin point for a familiar plot device...though it’s hard to pinpoint another film that tackles its subject matter in quite the same way. There are certainly movies centered around comas, memory loss, or deception, but they don't achieve the same effect; I suspect this is because the movie executed those elements so skillfully that others have avoided trying to replicate it for fear of falling short. It’s a prime illustration of effective comedic situations handled with care—there’s no reliance on humor derived from mistreatment or misfortune. The protagonist isn't subjected to harm or injustice, but finds herself in an uncomfortable and absurd predicament largely due to the eccentricities of her family, which is wonderful. The entire cast delivers exceptional performances. While there are recognizable actors involved, and Sandra Bullock certainly enhances the portrayal of Lucy’s restrained personality, the supporting players also shine, creating a remarkably evenhanded feel despite the various narrative threads unfolding. Another noteworthy aspect is its unconventional approach to suspense. Rather than withholding information from the audience that other characters possess, the viewer is initially privy to the truth, with pieces gradually being unveiled to the rest of the ensemble. If you haven’t seen it yet, add it to your watch list; I am confident it remains worthwhile today, and the absence of smartphones barely registers.

Source on TMDB