It’s this – the wry humour provided by the long-suffering Bonnie; the lovely lived-in quality of the friendship – rather than the lengthy swimming sequences and a few slightly unwieldy flashbacks that gives the film its crowd-pleasing appeal.

Audiences want to see Diana Nyad succeed, but the pleasure of the experience comes from watching actors become these characters. No matter how tricky such feats must have been to re-create, you get the impression that everyone involved was having a blast.

Peter Debruge

Variety