Woody Allen's filmography is concurrently uniform quality-wise and fairly heterogeneous plot-wise.
This one is a 'whodunit' (or rather 'did-he-do-it?'), coupled with a romantic comedy.
It works OK, but does not stand out as The Film he will be remembered for.
(Kind of sad that is bound to be 'Annie Hall' or 'Manhattan', both of which are over 30 years old.)
Hugh Jackman is as handsome as ever. Scarlett Johanssen sounds fake, and Allen himself has finally come to terms with the fact that he can no longer plausibly act the love interest of his young heroines.
A special movie-goer's award to Woody, also, for the exemplary length of his films! 1h35! Just Perfect!