Good, because it's quite large, containing around 60,000 words and being quite thorough. You get vowel length, the genitive and other forms you need to know in order to properly inflect the words, also the gender, and all the possible meanings. Definitely a good dictionary of Latin. What this book really lacks is an overview with some charts on how to actually inflect nouns, verbs, pronouns and adjectives. I know from other books that this takes up only a handful of pages, but the authors chose not to include this valuable part. Instead, there's a Latin calendar, some information about pronunciation and and overview on Latin numbers and measurements. But I got it for free.