This is very cool.

But, to be honest, I’m not that impressed. I can’t recall ever studying more than 3 hours for a test (usually about 2 hours) and just graduated an Ivy League college with an ~A average.

Now I did usually start studying 2 weeks or so in advance in multiple 20 minute sessions. I did so because last minute cramming doesn't work for me, but it did result in high grades with not so much total time spent.