This was a nice, easy read.
The style is similar to the Ramona Quimby books; each chapter has its own little adventure (rescuing dogs, putting on a circus) to fill up one school year. Betsy is definitely much better behaved than Ramona, but still has interesting adventures.
This is an easy book to read, however I would suggest adult assistance if a child were to read it. The story was originally written in 1939, therefore there are some references that children might not understand (word choice) or might need some additional discussion (reference to being hit with switches at school). I would recommend for children who enjoy reading and are mature enough to handle the understanding of changes in writing and society that have taken place since this book was published.
A very cute book with a likeable main character.