The video made a big deal about the cost of the sand paper at 41 cents each. After looking at a number of web sites and cost of the sand paper I feel the video was misleading about the cost. It appears he only tested one size and one grit. I would hesitate to assume this can be extrapolated to cover all sizes and grits. He also did not test it on different woods. The number of variables he did not test for is endless. Based on comments like Donn's and Oka's it seems there are indeed situations where other sand paper would be a better option.
Not saying this is not great sandpaper but I think he over sold it. I will buy some and expect in the right situation it will be a good option.
Testing of anything is testing

. Once you burrow down in the weeds you find more questions than answers. Reducing variables is imperative and with this subject it is almost impossible to do. Some of the most difficult and frustrating things I have ever undertaken involved testing.
I do appreciate the video being posted and it did make me aware of a sand paper I did not know existed.