I agree,it just depends on when you go,a peak or non-peak time.If you want to do every coaster,show and attraction and maybe a couple of coasters multiple times during the summer,spring break or around a holiday you probably need 2 days,especially with another coaster just added to it's roster.The park is very big with a lot of walking,although there is the skyride and train that you can use as transportation between the park.I first went to the park around 20 years ago and from that time the park has become a full fledged major theme park,back then I remember the only coasters were Python and scorpion,they had the questor simulator,a dolphin show, a couple of flat rides and the transportation rides.Now with so many more coasters,new animal exhibits and new attractions the park gets a lot more visitors,especially during busy times and weekends,but like a previous poster said,if you show up a Tuesday in late January or early February you can ride as much as you want as the park will be pretty empty,this wouldn't be the case if it was in Orlando which has enough year round visitors to decently fill up parks on even the slowest times.