Anyone used "Grammar by the Book"

I came across a product by Fortunately For You Books called “Grammar by the Book” and I was wondering if anyone has used this.  It’s a cd that you can use for ages 7-18, with teaching guides and worksheets for lower level and upper level grammar.  They say that you can use it with any book your child is reading, so I assume from that and from looking at the sample that the worksheets are completed from what they have read in a particular book.

It’s hard to tell from the sample what it’s really like, so I was hoping someone who has used it could chime in on this.

Thanks,

Sue