My children and I absolutely love SAXON math. They can't wait to get started on their lessons, and ask to do more than one sometimes. My children have been really successful with this program, and I have seen their math skills really exceed what I was expecting. I would recommend SAXON to anyone looking for a good solid math curriculum.
I have been disappointed in the quality of Saxon Math books for the last couple of years since they started using newspaper print pages in them. When tearing out worksheets and tests, the pages are so flimsy that it's hard to get them out in one piece.
We have just begun this book, but so far we have found it to be clear and easy to understand and follow. The extra practice is very nice to cement concepts. Our son is finding it challenging, but also easy enough as not to discourage him.