Critic Consensus: Sweet, smart, and quirky, Waitress hits the right, bittersweet notes through this romantic comedy through its witty script and a superb performance by Keri Russell. (rottentomatoes.com)
The central romance between Marco and Gina is only hinted at, and the ending on these grounds is surprising: as with Casablanca, their romance is not so much consummated as left hanging on an uncertain, slightly bittersweet note. (rottentomatoes.com)
There's also a hint that the film might conclude on a suitably bittersweet note. (filmireland.net)