I teach for Kaplan, and in my opinion, Kaplan's strategy for verbal BLOWS. If you're horrible at verbal and want to improve to the mean score, it will probably help... but if you're interested in doing really well, I'd take their advice with a grain of salt. Of the books I've seen, EK has the best verbal strategy. However, it doesn't work for everyone.
Honestly, the best thing to do is get some old AAMC MCATs and practice verbal. Go over the exams when you've finished them and study the answers. What makes that answer right rather than this one? You'll start to see patterns. It's all about getting into the MCAT writers' heads. It's time consuming, but it's the very best way. Good luck.