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BMW uses it too, but that doesn't make it good, it just means that porsche and BMW are good at macpherson struts. their camber curves aren't great (they don't gain enough camber during compression) and the travel is often short. but with a stiff spring, that doesn't matter as much.
the best setup depends on the vehicle and your definition of "best." but it's generally accepted to be an unequal length A-arm system like those used in formula one/indy/champ. push/pullrod/direct action usually has more to do with packaging and aerodynamics than anything else. with the right tuning, they can all be made to work more or less the same. i'm not really sure what a cantilever set up is, and a pushrod isn't really a complete setup, but a shock mount.
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