Has anyone used CTCMath? I am thinking about next year, for Algebra 1, for my son who is maxing out MobyMax this year (He is 7th grade, 8th grade next year.)

Has anyone done both? How do they compare? How well does the CTCMath work in explaining concepts? How well did it prepare your kids for upper level math, college entrance Compass Test, ACT or SAT?

It says it is NOT Common Core Aligned, which makes me wonder if it will be teaching what the tests want at the college level.