Pie charts are both adored and hated for their simplistic functionality. The general consensus seems to be that they are useful however, they are to many limitations. Nonetheless, the argument beckons for which form of pie chart can be proven to be the undisputed champion. In a study by Robert Kosara and student Caroline Ziemkiewicz they have done an analysis of the square, stacked bar, pie and donut charts. If you are new to the concept of filling a square to represent your data let us just say … it is very likely you are not alone.
It is common that the use of the square pie chart is not often correctly used, however it has many benefits over the other forms. Definitely, above and beyond the bar that represents two (2) data sets and resembles the loading status of most 19th century games.
Well without further adieu I invite you to read the enlightening article illustrating why the square pie chart is ahead of the curve.