As it says, it conjugates 301 Polish verbs (one per page) in full detail - present, past, future, conditional, imperative and participles. This takes up most of each page. This is followed by a small amount of information about usage, a list of prefixed verbs derived from the original verb, and 4 example sentences using the verb.
It is always four examples, even for verbs which have lots of different prefixes with different meanings. More help with usage would be more useful than all the grammatical detail, much of which is predictable. For example, as far as I know, the conditional is always formed in the same way, so listing it in full is a waste of space.
Also, with prefixed verbs it does not tell you the imperfective form. So adding za- to imperfective robic (to do) gives perfective zarobic (to earn), but the book does not tell you the zarobic is perfective, or that the imperfective of zarobic is zarabiac. So although they claim to include nearly 2300 verbs, for most of them they only give one aspect, which is only half the story.
In addition, the way the verbs of motion are treated is confused. In the case of chodzic/isc, prefixed forms are shown for chodzic (so they are imperfective), but for jezdzic/jechac, they are shown for jechac (so are perfective) - none of this is explained, so a beginner could easily be misled.
If you are really struggling with verb forms, it is OK, but when I want to know how verbs are used, I find it is very little use.