A friend got this for my daughter and I, and a lot of the projects in it are really suited better for parents with younger children, that being said, we loved it.
My daughter is almost 13 years old, and while a lot of the projects were a lot easier then she likes, they gave her ideas for doing similar things with a bit more complexity. The cardboard castle is a favorite, and she's got big plans for building her brother a dice tower now.
The other thing the book had that we both liked was a lot of information about how things are recycled, and a timeline of disposable manufacturing, so we both learned from it. It's good without being overly preachy, and since it's recycled crafts, the crafts are very inexpensive to make.