Political Compass doesn't tell you what political party you should vote for; instead, it gauges your ideology. The website explains:
The old one-dimensional categories of "right" and "left," established for the seating arrangement of the French National Assembly of 1789, are overly simplistic for today's complex political landscape.
And now you can compare where you fall, with the Presidential candidates and other politicians. Interestingly enough, most US politicians fall in the same box.
While I've heard some complaints about bias in the academic-developed questions around the Sugar HQ, I haven't heard too many complaints about the end results. Take the test and tell me what you think. Do you match up with your favorite politician? And, to see where historical figures fall on the political compass