I saw the kindergarten program several years ago and it didn't strike me as anything special. Manipulatives were abig part of it. The idea of having to watch a video to teach each little thing would drive me crazy. But YMMV.
I have heard critics say that the MUS lessons do not run parallel to typical courses of study. So kids may be doing well in MUS math, and then appear to underperform when taking standardized tests. If you don't care about testing it may not be a big deal, and I assume that by high school level, they are pretty much in step with other programs.
That's all I know...
