I don't feel like those behind this push have really argued their case all that well. First, people are being told that it's confusing and then when asked to explain, the advocates of this method just say that you rank your choices 1-9. Okay, but how does it work where you don't get your first choice but it slides down to your second?
I think the people in favor of proportional representation have done a terrible job of explaining it. If it's as easy as suggested, then it should be easy to explain.