Time Out review:
1977: cynical womaniser Harry (Crystal) and clean-living would-be journo Sally (Ryan) are thrown together on an 18-hour trip to New York. They don't exactly hit it off, but ten years later, having suffered the traumas of break-up and divorce, they meet again and find they can offer mutual support. Will their friendship move from platonic to romantic? It seems likely, but there's a problem: Harry is reluctant to commit himself, while Sally won't countenance one-night stands. Reiner's Woody Allen-ish comedy is, for all its up-front discussion of matters sexual, disarmingly old-fashioned. A mite too pat, it never really probes or challenges Harry and Sally's attitiudes; but Nora Ephron's extended, slightly sentimental, and none-too-original meeting cute scenario includes enough funny one-liners to hold the attention of all but the most jaded viewer. As ever, Reiner clearly likes his characters, and elicits sturdy performances from a proficient cast (Kirby and Fisher are especially fine as friends and confidants to the pair).
Here (and above) is the trailer.