Additional notes:
All the basic problem solving material and techniques are there - this is the whole rationale for the series. What it lacks is the founding principle that math is knowledge which is worthy of possessing for its own sake. Thus, it will fall short in depth. Practically speaking, it WILL prepare them for standardized tests - best at the lower grades.
(Michael Van Hecke - headmaster of St. Augustine Academy in Ventura, California, and homeschool father