Problem with PR is that nobody ever filled in the holes.
For example, if the NDP wins 20% of the vote in Ontario, do they get 20% of the MPs?  OK, if that is so, then who are the MPs?  Are they then chosen by the party?  So does that mean only party insiders go to Ottawa?  How can that work?  
I'm for a better representation in Ottawa, heck, in Calgary, our riding has been Conservative for at least 50 years and I've never voted for a winning local candidate and I'm almost 60.  However, PR just doesn't make sense as presented.  The PR people get a big fat F for failing to explain and failing to sell.