The main drawback quarters don't land at end of months any more.

http://en.wikipedia.org/wiki/International_Fixed_Calendar
http://en.wikipedia.org/wiki/Pax_Calendar
http://en.wikipedia.org/wiki/World_Calendar

http://en.wikipedia.org/wiki/Additional_Member_System
http://en.wikipedia.org/wiki/Proportional_representation

What if Abraham Lincoln, George Washington, Thomas Jefferson, Ronald Reagan, and Adolph Hitler were all running for president. Who would you vote for? Well, I wouldn't vote for Adolph Hitler. However, I don't know which of the remaining four would get my vote.