Book ticket in advance to avoid the queues. Go when weather is fine and take a jumper jacket; now you're set. Views are truly spectacular and forever. Consider a one way ticket as you can walk down (or up if energetic). Don't just linger at the top near the cable station as you can actually walk a considerable distance along the trails - couple of hours. The cable car floor slowly revolves so you get great panoramic views on the way up/down. Cost is cheap (Aust $22 return) and well worth it. An absolute must.