Nagashima Spa Land - Have I found roller coaster heaven?

Most theme parks have less than 5 roller coasters. In fact, before this day, there was only 1 other theme park I visited which has more than 5 roller coasters. What if we had not 5, not 10, but 12 roller coasters. This is Nagashima Spa Land in Kuwana, Japan - the park with the largest number of roller coasters in Asia. So the question is: Have I found roller coaster heaven?