It is very reasonable to reach your objective if you study intensively and will have the right material to study.
I highly recommend to have all materials from Manhattan GMAT
. All 8 sets, they are perfect for reviewing math, and sentence correction strategies.
I am not sure about critical reasoning part, and RC, as I did not do it much, myself either.Kaplan
books just emphasize guessing, and picking numbers for math section, which is not useful in shooting for 720
Good luck with preparation,
I am just starting to study.
As I am shooting for 700 also!
Never give up,,,