A few strange typos and editing choices (e.g. leaning toward manuscripts of Sallust with '-und-' instead of '-end-' in gerunds which are not correct by modern manuscript tradition).
Beyond a few editing issues, the strange cut and paste nature leaves the reader with work to do to fill in the blanks (like most of sections of Livy, Eutropius, Sallust, and Cicero, but sentences are cut out for vocabulary limitations).
Overall a good book. I recommend Jenny's Third Year Latin as an overall better advanced reader for later high-school or intermediate college students (as Pliny, Ovid, etc. are somewhat more gripping than this boring history lesson, even better sections of Cicero there).
Basically, if you want to read consistently, this isn't bad. Geoffrey Steadman's series, Dickenson College Commentaries, and Faenum Publishing are also great, full-text resources like this (without the clipping out of full segments).