I like how they have different options for each textbook, so you can choose what types of books are included in your plan.
It is also easy to cancel if needed at any time! The customer support team could be more helpful when trying to set up textbooks or other resources through their website/app. We use this primarily as an electronic resource rather than physical copies (as we still purchase most our texts). This has allowed us to keep track easily with all students' progress without having them carry around hardcopies everywhere.