All through this film I kept wondering 'What's the point?'
Yes, Pfeiffer's performance is good, although not so good as to bring us to care about her, let alone understand why she did what she did. Casually giving away all her money in meaningless gestures (a €100 note to pay for a coffee, a bundle of notes to a homeless man, €2000 for a 'last meal') struck me as profligate and stupid, not to mention thoughtless, as her son, whom she said she loved, would be left with nothing. (Unless he had a trust fund from his father, though we never learned details like that.)
Contrived plot devices, like the runaway cat embodying the spirit of her late husband, or the detective hired to find the cat moving into the apartment, did not work for me either.
Scenes in both NYC and Paris were beautiful, though the scenes on the cruise ship they took from New York to Paris (why?) reaffirmed my vow never to set foot on a cruise ship. Since it's the closest I'll get to the Place des Vosges or the Canal Saint Martin soon, I'll give it 2 stars for being beautiful to look at..