Aximili85
I don't know Ilya.b, the Manhattan's books are great and I agree they are a must read, but some of them tend to miss a few crucial concepts and their suggested approach is often too lengthy..
but then again to add, must-do to start off with.
Maybe...
From my real experience on Quant - I didn't have any issues with concepts on the test and believe
MGMAT books helped here. I knew the concept for every problem but I guess I screwed up a couple of problems by computation errors.
Regarding Verbal - Although I found information regarding RC & CR in
MGMAT books useful, it didn't help me much apart from engaged reading & making notes. I relied more on gut feeling rather than any structured approach.