"In the end, top-down versus bottom-up are really just two different ways of addressing the same problem. Which one you, as a user, will prefer depends largely on what you want to get out of your device. As a device that does many tasks, there's a lot to like about the G1, even if it's not all there yet. Its user-interface quirks may bother some people more than others, who will be willing to overlook the annoyances because of the sheer amount of functionality that the G1 sports. If nothing else, Android provides a serious competitor to Apple in the smart phone market that will hopefully force both to continue to improve."