ApplicantLab is an amazing tool to make sure you tick all the boxes of your application.
The amount of material and guidance is pretty breathtaking considering the reasonable price tag.
The tips offered for a large range of b-school are very specific, recent and most importantly unique. (e.g. very different guidance for Columbia as opposed to Tuck).
As a note of caution;
ApplicantLab does not do the work for you. To fully utilize the potential AL offers, you do have to put in quite some time, however, the investment will certainly be worth it.
I used the tool to apply to both Cambridge Judge and MIT Sloan and got into both schools.