Canada Electoral Reform

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I don't mind the Senate model used in Australia. Each State/Province has equal representation in the Senate (Territories less). The Senate is half the size of the Lower House. Half the Senate is elected each election. Senators are elected using STV.

It means that while the Lower House usually has a majority government of the strongest party and that constituencies are based on a geographic area, the Senate has a greater number of minor party representatives. It creates a bit more stability of government, while still ensuring a government doesn't have too much power through controlling both houses.

[Smid]

In a situation where it's reasonably obvious who the top two finishers'll be, it works out much like (non-compulsory) IRV (unlike the Australian version, then). In a situation where that's not the case, expect the result to get down right screwy.

Sort of like Queensland and New South Wales state versions, then? Where it's optional preferential - in other words, you can number as many squares as you like?

We don't just take the two top finishers - we exclude the bottom finisher one by one until it's just the two remaining.