To put it very mildly, Susie McCabe has not had an easy time of it lately: in July last year, she survived a heart attack aged just 44. After some delightful warm-up material here, she launches into Best Behaviour with some wonderful gags at what she sees as the inevitability of her almost-fatal condition. Jokes about Scots’ ill-health are rife at the Fringe (usually by English performers), and it takes real skill to make this stuff work. Deservedly performing on one of the Fringe’s biggest stages, McCabe makes use of her vast space well, pacing around and occasionally teetering on the front edge to make a point. Her observational material hits every mark, including a long section on the industrial toasters used for hotel breakfasts that would have been rote in other comedians’ hands.

It feels like McCabe has been on the scene forever. She’s so at ease when performing and is a wonderful raconteur who controls her audience with the soft power of a seasoned pro. It’s not until the very end that McCabe entertains a moment of solemnity, briefly offering a glimpse at the true extent of the pain she’s recently endured. Perhaps that might be the thrust of next year’s show but it seems off-limits for now.

Susie McCabe: Best Behaviour, Assembly George Square, until 24 August, 8.35pm; main picture: Curse These Eyes.