AFAIK, from my atheist's understanding of Buddhism, you don't get out of the cycle of life and death, samsara, with good karma. Quite the contrary, you're almost guaranteeing your next life will be that of some kind of angel that lives for millions of years, and delaying your eventual enlightenment by that much, since you can only get enlightened on Earth.

Not that it's a bad thing, people are allowed to enjoy reincarnation, and it probably beats being reincarnated in hell.