Colloquial Basque is divided into 12 units, each one concentrating on a particular conversation venue such as shopping or asking for directions. In order to break up the material into more manageable segments, the units are divided into groups of smaller lessons. This is an ideal structure for self-study students who may only have 15-20 minutes here and there to devote to the course.
Each lesson starts with a dialog or some other written Basque text. In addition to the written segment found in the book, almost all of the conversations can be listened to on the accompanying audio materials. The speech does tend to get a little fast in places, mimicking the actual speed of conversation used by Basque natives, so you may need to listen to the dialog several times.
Instead of being gathered together at the end of each unit, exercises are scattered throughout each lesson in order to reinforce points as they are introduced. An answer key is found at the end of the book, but it’s not quite as comprehensive as I would like it to be. On one hand, this can be explained away by noticing that many of the exercises ask you to “make up a conversation” on a certain topic so there is no real definitive answer. On the other hand, I’d still like to see examples of such conversations that students could use to increase their understanding of the material.