I found the collection to be very well done. They put emphasis on practicing and receiving immediate feedback, which I think is very successful so that the student can identify where to pay more attention. In addition to being correctly framed in the AP areas, it makes a lot of sense to prepare with quality for the exam. The readings have a sufficient level and length to work with quality and easiness. There isn't a clear way to connect the material to Canvas or Google Classroom, which adds another layer to instruction that isn't usually good for students or teachers.