Is it safe to assume what you don't get is the "top-two" system in Washington, or are you referring to something else?
Assuming you are referring to our brand-spanking new system here:
Instead of having to choose a party, and then vote for your favorite Republican or Democrat (respective to the party you chose) to move on to the general election, everyone gets to vote (regardless of party affiliation) for their favorite person to move on to the general election. The two most popular (yes, as with most things in life, it's a popularity contest) move on to the general election. So, it is possible that you could get two Republicans, two Democrats, two Independents, two Fascists, whatever else, vying for election.
I don't remember exactly which positions are voted this way, but some are restricted.
I like it because I get to vote in the primaries (no forced/false party affiliation just to be able to vote) and because, theoretically, you get the best two instead of one from the Dems and one from the Reps (can you shorten Republicans like that... I've never seen it).
And, that is what I know about that topic.
Of course, there are advantages and disadvantages to both, but I generally like whatever minimizes party bullcrap.