Saxon Math is a great program. One of the things I like the best is that it teaches math fact memorization by way of pattern recognition. My children have done very well in this program. As their teacher, I see how well the methodology works.
I bought this to help my twins review 2nd grade material which they struggled with. We are working on this over the summer. They will be going into 3rd at a local Catholic school. I actually wish our school used this curriculum. It follows a logical progression with lots of review of concepts throughout. The activities are great. The manipulatives kit is wonderful and a must have. We will definitely continue to use it through 3rd grade I'm sure. But it was pricey in my opinion. My only other criticism is that the teacher/parent edition is not laid out as well. I have to really sit and review and read through a lot of stuff in order to follow the lesson. Not a big deal, but I would prefer to be able to quickly review and just do it.