This frequently reprinted volume is the 'sine qua non' for all who would attempt to write faultless classical Latin Prose. It is impressively detailed in explaining syntactical nuances, in its exemplification and in the range of its exercise. Bradley's Arnold remains an essential source.
dubio quin liber optior pro discipulo qui linguam latinam scribere velle, suppetat. bene disponitur, et exempla pro usu cui responsa in interrete sunt, habet. optime in ludo sit, sed satis solus domi vel legere vel facere est.
The grammatical section is concise enough not to be daunting and thorough enough to be helpful. Examples were really enlightening because they stuck to simple Latin, making it easy to translate without looking at the English. I could see myself using this with my high school students as a reference. However, the grammar is not exhaustive; Allen and Greenough is a much better place to turn for fuller explanations.
There are many, many composition exercises. I did just a few, but they were for the most part good practice for the grammar discussed in each section. Often, though, they are pretty diabolical. Thankfully, there is a good English to Latin section at the end.