I am a pretty big fan of Transcender. Since I started taking tests, it just seems to match my way of thinking. Seems like they cover all of the bases, and for me, the most valuable information are the explanations for the answers. When I don't know the specific subject, I then go out and reference books online, msdn, books, other sources.
The transcender test is kind of spendy, but my company covers the cost. I think they did a good job in writing their case studies to get you into the routine of reading and searching for tidbits and clues that lead to solving the question. Anyway, that's just me... certainly many ways to skin the cat!
Good luck on the test!
MCITP - Database Administrator (SQL 2008)
MCSE: Data Platform (SQL 2012)