Math U See - a good curriculum?

I really like Math-U-See. I'm in 9th grade and I've used it all the way up to this year, in which we started a co-op in which I do math, so I don't use math-u-see anymore, but I really liked it. I think it explains the concepts clearly, and helps you understand it easily. And you can also choose how much you want the student to work with it, because if you understand the lesson really well, then you can ign them only a few pages instead of all of them. I really like it and will probably be doing it next year. Hope this helped!