The bad:
The examples/exercises are not good. Students can't work on their own. The teacher's book it's not clear, even though is trying to tell you exactly what to say and do, it misses by a lot. Doesn't seems to be aligned with standardized assessments like SAT, PSAT, College Board, PARCC, etc. The definitions are not clear.
The good:
It can be used as a guide to follow if you're using your own examples/exercises, worksheets and study guides.