It seems odd to rate this book at all, given it's essentially unedited (or minimally edited) existing texts.
This is a neat collection of intermediate-level authentic Latin texts. There's no Caesar in sight, and little of the regular poets one might think of for highschool learners. The level here is consistently difficult. A student who has got through all of the Wheelock's texts including the unedited excerpts at the end, would still need some guidance here from a teacher and a good dictionary. (And one hopes, some additional fun translating Catullus and, yes, even a bit of Caesar, on the side!) But this is a good test of one's skill. Also a nice reminder for students - whether in classroom or on their own - that, on the other side of this text, lie hundreds of authentic Roman plays, essays, histories, and non-fiction books to be (slowly) (very slowly) (verrrrry slowly) devoured.