I just recently got a new book Our Discovery Island 3.
Last year my group did Fly High 2 and then this year we jumped to ODI3 and I hate it!
We are going back to FH4 next year since we saw that this book was not as good as FH.

Has anyone used this book?

I personally hate it but wanted to know if you have used it, how long were your lessons? 45, 60 or 90 minutes
My lessons are 90 minutes long and we do 9 months per course.
This book looks like it will be done in 3 - 4 months max. The grammar is horribly presented.

Any help how to use this book?