Saxon Math...just say those words to someone and you will definitely get a reaction out of them. In my house the reaction will not be very positive. I'm guessing that it is because there are A LOT of problems to do with each and every math lesson and there are A LOT of lessons in each book.
If your child really likes math and likes to tackle a lot of problems, then this might be a good fit with him/her.
There is a lot to be said for this program:
I think the biggest negative I've heard is that there are too many problems to do and because of that most people I know (myself included when we used this program) only assign either the even problems or the odd problems. That cuts each lesson down to only about 15 problems instead of 30.
We had been using Saxon for awhile when the D.I.V.E. CDs became available. There was one CD for each book and each lesson was taught via the computer using a "blackboard" that the "teacher" used to teach the lesson. It was both audio and visual so it really was beneficial to those learning styles, and it helped to lighten the load off of the parent. I would have to say that if you are considering using this math curriculum, you really should consider getting the appropriate D.I.V.E CD; it is worth the extra money.
Since then, Saxon has come out with a Homeschool Edition which is more user friendly. It is a workbook format and comes with a soft cover textbook, a solutions manual and a worksheet and test book.
In another update, for some of their levels, they have replaced the confusing 5/4, 7/6 combos with books called Intermediate 4 Kit and Intermediate 5 Kit. While I have not seen them in person, it appears that they have revised their older versions and included more practical applications as well as additional activities. The kits come with a student text, testing book, the Power Up workbook (the workbook to complete the "Power Up" section of the main book) and the solutions manual. There are also two additional workbooks that can be purchased if desired: the Intermediate Adaptations Workbook and the Written Practice Workbook. Click on the link in the grey box to find out more about all of these options.
In short, I believe that if your child struggles with math, then this might be a slightly overwhelming program. If they can plow through it, however, they will get a very good math education. You'll probably have to give this a try to see if it will work for your kids or not. You can usually find it used, so that might be a good place to start before investing in the whole program.