3.0 out of 5 stars
It can help during the preparation, 15 Dec. 2013
I wouldn't however think it reflects the exam topics very well. It is (and presents itself as) "study notes & review questions" so as part of the exam preparation I think it is ok but some topics aren't exactly rocket science (and should maybe left away) while others are dealt with much too briefly. I also found the large print quite irritating: I'd much prefer a thinner edition with a smaller print.
Don't get me wrong: it's okay for what it is but don't expect it to be the silver bullet for the 70-457 exam.