WTM used to recommend Math U See, which I think suits visual spatial types very well. But the criticism I have heard over and over again is that MUS users score lower on standardized math tests. They learn things in a different order and (just my opinion, we used it for geometry years ago) they are not so thorough. I find it curious that WTM users are leveling negative comments at Singapore.

There really isn't one best program for every sort of kid. I think the most useful information is about content, structure, expense, etc. and not so much "this is good" or "this is bad".