In favour or against the coursebook?

In my opinion I´m in favour of using a coursebook. First of all because it is very usefull for teachers and learners because it shows the progress of the learner in the second language and also works like a planned structure so they can know what´s the next step and if the teacher is not completely sure about his or her knowledge the coursebook brings them guidance and support, in this case they won´t need any other expensive material to the class.  Finally the coursebook helps the learners to be indepent in their learning process studying in their home if they need more time to learn. In the other hand it could be negative if teachers don´t make interesting activities to motivate the learning process of their students, just in that case the use of the coursebook could be negative.