I think Auténtico has a lot to offer. There are lots of resources here to help students learn Spanish. There is a lot to teach vocabulary words, lots of listening activities, lots of culture, including videos, as well as reading and writing. It has IPA's. I think having an app that students can use on their phones is also pretty impressive. I like that the pruebas have automatic remediation.

Auténtico is authentically a great source of knowledge. They have organized the content in a very user-friendly way and the digital tools allow students to enter naturally and at their own pace into the activities. One of the things I liked the most is the integration with Google Classroom and the teacher control page, the progress visualization is very effective. Without a doubt a book for learners of Spanish highly recommended for its content and for the technological integration it offers.