This is very important to read along with the strategies and tactics book. Being able to break down the language of the exam can raise your MBE score significantly.
I retook the MBE in February '09 and went from 133 July '08 to 143 using Adaptibar, I missed the Feb. essay in my state by one question. Thankfully I don't have to take the MBE in July. I did 1400 Adaptibar questions, they are actual MBE questions and I swear I recognized a good portion on the bar. For the money you can't go wrong plus being on the computer I did them wherever I had Internet access.