70-310 and Safari

It appears Safari is adding a lot of Que's training guide books, including Mike's 70-310 training guide.  In the past two weeks I think I've gotten at least seven people to sign up from my classes at work.  I wish I would have given them another shot earlier than I did.

Anyone know if the 70-229 training guide is any good?  I'd grab it and flip through it, but it takes up two slots and I'm just not in the position to be throwing away slots on my bookshelf.