We pre purchased a ticket from a vendor recommended by a taxi driver. Not sure if it was good value or not as didnt research before the purchase. We were advised to go around sunset to get the day and night view, however we went around 5pm. There was a lot of people there. We had a 40 minute wait to go on the sky box. Lucky for us we got on before the lightening started and everyone was evacuated. Over all a fabulous view and a worthwhile experience.
Found out after we hiked up the hill that there was a courtesy bus that went every 15 minutes. Hike not that hard for avid walkers, however children and unfit people may struggle.