First, this obviously gets run against man-to-man.
Second, it often generates a switch.
Third, the screener is almost always open on the roll.
Fourth, neither the offense nor the defense knows who is getting screened.
Fifth, eventually the screener get a free 'slip' to the basket.
Sixth, you can run the 3 through and get an elevator screen from the top.
Seventh, you can align the offense along the lane line and bring the screen from the side.
In other words, this simple set generates lots of flexibility, mismatches, and creates some high-quality scoring chances much of the time.
