I like the Nova Press book a lot. Some of the problems are tough (for me) and some are easy. It's very much like a combo of Kaplan, OG & PR. I especially like the explanations to all of the problems in each section is broken up into different problem types. It really tests exponents, fractions, & square roots very well, much better than the OG. If you are great at math, you probably won't need it. I'm still working through it, but the verbal seems good too but I think OG is obviously the best for that section.