3.5 stars rounded down.
An interesting-enough biography, I liked the format that Branson took with tracing her family back to span the last century rather than just focus on the here and now - so included elements of her research into her own family as well as a biography of her life growing up and her career. It's not the easiest to follow though, as a result, there are many branches of the family and the presentation isn't always systematic. It is broadly chronological, but split into parts spanning specific time periods, but within them the information does get a bit jumbled.
I listened to the audiobook that Branson narrates herself, a touch that I always like, as the emotion of the writer does come through as it did here. It is obvious that she's no professional though, the reading speed wasn't always consistent and I found that a bit distracting. Also a bit overly long and I got bored towards the end, though granted it spans a long time period so maybe that is justified.