hey i can only talk to u from my experience (and some of my friends). i have friends in kaplan
and i have seen their books and to be honest im not a fan. im in manhattan gmat
's course and i really like the materials. the books are great and very very helpful. not only that but as i posted in another thread they also provided me with a test simulation book and marker that resembles the one we get at the exam which helps me prepare for exactly how i will be working on the exam. you can buy the booklet on their site in case you decide to go with kaplan
or something else and are still interested in it.
id recommend it to everyone.