Feedback on Manhttan Strategy Guides

MBA GMAT
1

Guys, Can anyone please let me know your inputs/review/feedback on Manhattan GMAT Guides? Are these good to start the GMAT prep? Thanks, Vijendra

2

Guys,
Can anyone please let me know your inputs/review/feedback on Manhattan GMAT Guides? Are these good to start the GMAT prep?

Thanks,
Vijendra